Version Information

Forge version: 14.23.5.2846
Botania version: r1.10-362
Twilight Forest version: 3.9.984
Baubles version: 1.12-1.5.2

Further Information

Link to crash log: https://paste.dimdev.org/powejewabe.mccrash
Steps to reproduce:

1. Get any Botania bauble and put it on via right clicking with it in your hand to know where it usually goes, remove it and put back into your hand.
2. Get Twilight Forest bauble that can go into any bauble slot and put it in the one expected by the Botania bauble.
3. Right click the Botania bauble back on again while the Twilight Forest bauble occupies it.

What I expected to happen:
The Botania bauble would switch with the bauble occupying the slot, leaving you with the Twilight Forest bauble in your hand as it does with other Botania baubles (and after some more testing, with Thermal Expansion capacitor baubles, too).

What happened instead:
The Botania bauble remained in hand, error info appeared with its log above. Playing on FTB Academy 1.1.0 mod pack that just displays error info with Ctrl+I and doesn't crash to desktop.

(To be fair, it's most probably Twilight Forest's fault, so I'll post a bug report there as well. The crash log says "Suspected Mods: Botania", but what does it know, right...)