Thanks Shelby. We have deactivated/tried combinations, and with or without your plugin activated the Waitlist buttons do not appear. Debugging mode didn’t reveal anything either.
At this point I’m 99.9% sure your add-on isn’t an interference, but as I said, Woo support won’t address on their end until I can confirm.
If it’s easier to give someone temporary access (directly, of course) to confirm I’d be happy to facilitate, just need to get this resolved ASAP.