Right now there is a bug in spigot which breaks Trial Spawners indefinitely in a world if the AsyncStructureGenerateEvent (this is what JLI relies on) is being used for the trial chamber structure. Therefore this update will simply force blacklist this structure if the version that you are using is effected by that bug and will warn you about it. So chests in trial chambers will not be converted if that is the case however I think Trial Spawners are more important than these chests in that case