There is a special place in hell for people that use Boostrap, only to destroy it and recreate to destroy it and recreate for "customisation purpose"

I just spent a whole day figuring out what the fuck was going on with the collapse system that wouldn't trigger or was dying to trying to, only to discover that someone played the smartass by adding or removing a class when the collapse was triggered, so it would put everything in display:none

FUN FACT : ARIA-DISPLAY="TRUE/FALSE" HAS THIS EXACT PURPOSE, FUCKHEAD