I cannot check with /#whatisthis because maze generation crashes my server. Parameters like

B:decorationHacks=false
S:mazePlacementReversesPerRoom=1.0
I:mazeTimeout=1

had no effect. Would appreciate a solution or list of all mazes in mod, so I can disable them manually. Thanks.

mazeTimeout=1 should do the trick. It will, however, only remove the actual maze solving, not the structures themselves. If you want to remove the structures, /#search for maze or /#search --maze might also work (I don't recall).

If mazeTimeout=1 doesn't stop mazes from being solved, please re-report this in a new issue.