On our server we have recently run into a problem regarding the saving off our claim flags.
We will set up group flags in an admin claim such as
/claimflaggroup trainer enter-claim minecraft:player false
and everyone works well. Players trainers cannot enter and everyone else can. The problem appears when the server crashes or restarts. Everytime it stops everything seems to be reversed. Trainers can now enter but no one else can.
Any help with this problem would be greatly appreciated and I am completely willing to further describe and provide more details if necessary.