I've not experienced that yet. Maybe try playing people at a different skill level and see what happens with the timer?
Bad internet connection

There's a bunch of possible reasons; and shouldn't blame the Internet immediately. It may be chess.com server (e.g. a server running on generic virtual hardware, e.g. Amazon EC2, isn't suitable for anything near realtime), your PC (e.g. some terribly configured virus scanners can freeze your PC), LAN (e.g. somebody using the microwave next to your Wifi signal), so many more. But the poor Internet is always being blamed right away.

There's a bunch of possible reasons; and shouldn't blame the Internet immediately. It may be chess.com server (e.g. a server running on generic virtual hardware, e.g. Amazon EC2, isn't suitable for anything near realtime), your PC (e.g. some terribly configured virus scanners can freeze your PC), LAN (e.g. somebody using the microwave next to your Wifi signal), so many more. But the poor Internet is always being blamed right away.
All of those things I have not thought of. And I suppose any of them could be the reason. But what I dont understand is how any of them could slow down (tremendously) my connection at the beginning of a game and then suddenly disappear when the game time gets down to about 20 seconds or so. How could a microwave know when I have 20 seconds left on my clock to finish a game of online chess? Some days I have a green connection and everything is fine, but other days, like yesterday, every game starts off red or yellow and I have to wait until the connection allows me to move, and then with a few seconds left in the game, turns green and I'm able to move as fast as I want. The only thing that I can think of is some bizarre computer virus that somehow knows when I'm playing on chess.com and also knows when the game is nearing the end. If it was once in a while I wouldn't think much about it, but it's been a distinct pattern. When it happens 10 times in a row I dont think it's co-incidence.

Here's an idea:
1. On a unix-like system (e.g. Linux), I'll start a tcpdump to capture all traffic on the interface used by my web browser.
2. Capture traffic of a chess game that experiences the slow down/speed up.
3. Capture traffic of a normal game.
4. While capturing the traffic, also run continuous pings to chess.com (or wherever the traffic is going. (ok, technically pings still may be affected by chess.com server, but it is likely not big effect -- sorry, had to include this since there're so many nit pickers on online).
5. The key to look for is the delay (latency) between your web browser/chess.com client and the server; is the latency constant (check ping results)? is the chess.com server response latency constant (check tcpdump results)? Excessive retransmits (usually there shouldn't be any)? Compare the traffic characteristics between a slow/speed up game and a "normal" game.
This should tell you where the problem is. It sounds complicated, but it really isn't. You can read up on the following (you just need to run like 3 programs): tcpdump, ping, wireshark (to easily read tcpdump capture). best of all, all 3 are free!

The problem might be caused not only by the bad login status of game servers, many factors affect the stable performance of the network. Try to use WiFi analyzer . For me, it was the easiest way to solve the problems associated with WiFi. A convenient and simple interface, a wide range of tools for diagnosing and troubleshooting can quickly and accurately find the source of the problem, besides it's free.
usually i know that chess.com is a [removed -- MS] that is really cringy. As if they are gonna improvise any [removed] improvement on their prick old program

I have nom connection problems with Chess.com but I do with ICC. I haven't been able to play Bullet on this site for 2 weeks.
I have the same problem. I lose a lot of games because of this message message. I can get this message wherewer i play. Home computer, telephone on 4G, work.. So i dont think its the internet connection but chess.com`s servers

Free players get the free server package.
First of all there's been an influx of new members on the site. Second, your free account comes with those data consuming ads which slow your connection. Third, it's possible free accounts are pooled separately from premium accounts, and the free pool gets a lower priority. Lastly, it could be a number of other things. If there is a pattern then some other app could be responsible.
You say the pattern is you start the game off with a bad connection and then end the game with an improved connection? Something could be analyzing your connection every time you start a new game.

One thing's certain, the site will claim it is the ads. Which it probably is. Now what this means is that the problem is with google. And, well, if you want to get rid of the problem get rid of google's ads.

I am continuously losing games because of connection issues. It is extremely annoying to get kicked from a game for a 10 second disconnection. Please chess.com administrators, change the policy to at least wait 1 full minute instead of immediate abort of bad connections so I at least have time to switch from my wifi to my data!

Problem with 192.168.100.1 address
Everytime I type in the 192.168.100.1 address, I receive a message "Internet Explorer Cannot Display
Webpage". I have tried this several times and it doesn't connect me to the website.
HELP! https://192-168-100-1.org/

I noticed recently that whenever I'm on Chess.com, my internet connection suddenly starts dropping packets. I tested this by running a continous ping to google.com. The time to live is in miliseconds (12-13 ms). When I launch Chess.com website, the pings suddenly time out and eveyr other device that is connected to my network also suffers. It happens from my connected PC and also from my laptop on WiFi. Anyone else having similar issues?
I've been thinking about this for several months and have noticed a distinct pattern that I'm ignorant about. I lose many games on time because of a bad connection, which I dont mind too much. But what I do not understand, and hopefully someone smarter than me can comment on, is why so many games start out with a very slow connection (10 or more seconds per move) but at the end of the game I can move as fast as I want. I dont really care if I win or lose, but it almost seems like the internet is intentionally wanting me to lose on time. It waits until the time is almost up, and I have a winning position, and THEN allows me to move as fast as I want. This almost always makes me make stupid mistakes because I only have 10 or 20 seconds left to finish the game. I find that I am now playing people who I really enjoy playing with, but are playing at a skill level I'm not too crazy about. Any ideas?