While shulker box is empty, everything looks good:

But if you put something inside, the tooltip overlaps jei integration tooltips:

What do you need to reproduce:

• Minecraft (1.16.5)
• Quark (r2.4-312)
• JEI Integration (7.0.1.15)

You also need to enable tooltips in jei integration config as they all are disabled by default.

Hello! Quark's moved to 1.18 now-- unfortunately, this means that (unless your bug is critical and/or game-breaking), we're closing support for issues filed for versions prior to it (e.g. Quark on 1.16).

If your issue still occurs on 1.18, or if your issue happens to be rather critical (e.g. consistently crashing the game with no other mods present), please leave another note or open a new issue. Thanks for your cooperation!

(This one's fixed on 1.18, by the way.)