This is a bit of a follow-on to a previous issue, #1663. Many details are mentioned there that I won't bother repeating here. Doing this now as a new post because I've come to the (amateur, uneducated guess) conclusion that the problem likely lies entirely with Quark.

As fully detailed in that prior issue, I have had Shulker Box right-clicking functionality disappear after removing any one of a dozen different mods, and after adding entirely different, new mods. I've also had it disappear for quite awhile only to suddenly start functioning again after a simple, minor-version update to another mod.

Just a few moments ago, I had an unrelated crash, and after booting back up, I can once again no longer right click items into Shulker Boxes. Nothing was changed; I simply crashed, restarted and had lost functionality.

Please tell me what logs or information I can provide that might help y'all look in the right direction. This is obviously not a consistently-reproducible issue, so I'm not really sure where to start with that.

This bug still exists in 1.15.