4-player Chess "Autoclaim" question

Hi all - I'm new to 4-player chess and trying to figure this out one (see image below). Yellow won on the next turn by "Autoclaim". I was reading about autoclaim, and it seems like it is meant to "protect" a checkmated player who is in second place by points, but only if they're up by 20+ points. In this case, Green is in 2nd place by 4 pts, but autoclaim kicked in, preventing Blue from having a chance to try for the 1st or 2nd place win. 

Anyone know what's going on?  I pasted the PGN below the image too, if it helps. TIA!

[GameNr "33380873"]
[TimeControl "1+7"]
[Variant "FFA"]
[RuleVariants "DeadKingWalking EnPassant PromoteTo=D"]
[StartFen4 "4PC"]
[Red "zReMaK"]
[RedElo "1500"]
[Blue "its_HADI"]
[BlueElo "1500"]
[Yellow "petyastehlik"]
[YellowElo "1641"]
[Green "candeezymac"]
[GreenElo "1500"]
[Result "zReMaK: 5 - its_HADI: 34 - petyastehlik: 47 - candeezymac: 38"]
[Termination "(Blue +20)"]
[Site "www.chess.com/variants/4-player-chess/game/33380873"]
[Date "Wed Dec 28 2022 19:11:55 GMT+0000 (Coordinated Universal Time)"]
[CurrentMove "93"]

1. i2-i4 .. b7-d7 .. g13-g11 .. m8-k8
2. h2-h4 .. Na5-c6 .. g11-g10 .. Bn9xi4
3. Ne1-f3 .. Ba6-c8 .. g10-g9 .. Nn5-l6
4. Nj1-k3 .. O-O .. g9-g8 .. Qn7-m8
5. Nk3xBi4 .. Na10-c9 .. g8-g7=D .. Qm8xNi4
6. Nf3-g5 .. Nc9-e10 .. Qg7-g10 .. Qi4-h5
7. f2-f4 .. Ne10-f8 .. Qg10xm10 .. Nn10-l11
8. Ng5-h7 .. Nf8-e6 .. Qm10xRn11+ .. Kn8-m8
9. f4-f5 .. Ne6-f4 .. Bf14-h12 .. Qh5xh4+
10. Qg1-h2 .. Nf4-g6 .. Qh14-g13 .. Qh4-l8
11. Qh2-h6 .. Nc6-e5 .. Bh12xQl8 .. m7xBl8
12. Kh1-h2R .. d7-e7 .. Ne14-d12 .. Nl6-j7
13. Kh2-i2R .. b10-d10 .. f13-f11 .. Nj7xQh6
14. Ki2xBi1R .. e7-f7 .. O-O .. Nh6xf5
15. Ki1xj2R .. Bc8xNf5 .. Nd12-e10 .. m5-l5+
16. Kj2xRk1R .. b9-d9 .. Qn11xk8 .. Nl11xk13
17. S .. d9xNe10 .. f11xe10 .. Bn6-j2
18. Ra6-a7 .. Qg13xl8+ .. Km8-n9
19. f7-g7 .. Qk8xm6 .. m9xQl8
20. Ng6-h4 .. j13-j12+ .. Kn9-n10
21. Bf5xNh7 .. Nj14-k12 .. Bj2xNh4
22. Bh7xe10 .. Nk12-l10 .. m11xNl10
23. g7-h7=D .. Rf14-f10 .. Bh4xRa11
24. Qh7-h8 .. Rf10xl10+ .. Kn10-n11
25. Qh8-f8 .. Qm6-m10+#
26. Qf8-f9 .. R

If there are only 2 players left and one of them is with with at least 21 points higher than the other, the winning one can just resign (the resign button turns to an autoclaim button in this scenario) and give the opponent 20 points which can't help him reach the winning player.