PAL issue: java.util.ConcurrentModificationException

[mpatsift]

Since we updated from polycraft-1.5.4-20221114-09.17.43.jar to polycraft-1.5.4-20230216-10.56.33.jar , we've had several java.util.ConcurrentModificationException errors in PAL.

Attaching pal-tournament logs for a few:
pal-tournament-ph3-shared-2-2-2-E-2023-03-01-133145-openmind0_pal-tournament.log.gz
pal-tournament-ph3-shared-2-2-2-H-2023-02-23-235051-openmind0_pal-tournament.log.gz
pal-tournament-ph3-shared-3-1-1-H-2023-02-23-230113-openmind0_pal-tournament.log.gz
pal-tournament-v2-nonov-3-games-2023-03-02-193931-openmind0_pal-tournament.log.gz
pal-tournament-v2-nonov-pogo-100-pn-easy-recipe-no-pogoist-two-diamond-ore-2023-02-25-222326-openmind0_pal-tournament.log.gz
pal-tournament-v2-nonov-pogo-100-pn-no-pogoist-2023-03-01-125325-openmind0_pal-tournament.log.gz
pal-tournament-v2-nonov-pogo-100-pn-no-pogoist-2023-03-01-193933-openmind0_pal-tournament.log.gz

[mpatsift]

Seen again:
pal-tournament-ph3-shared-3-1-1-H-2023-03-08-150011-openmind0_pal-tournament.log.gz

[mpatsift]

Three more of these in our recent testing. I won't bother posting logs, but, for future ref, I can provide logs for:
pal-tournament-v2-nonov-3-games-2023-04-18-170118-openmind0
pal-tournament-ph3-shared-6-3-1-M-2023-04-13-071006-openmind0
pal-tournament-ph3-shared-6-3-1-M-2023-04-18-174058-openmind0