The default hotkey for Build Guide is B. This hotkey conflicts with a hotkey from another mod. I have changed this hotkey using the vanilla controls menu. The hotkey remains correctly changed for the duration of the play session. After closing and restarting the client, the hotkey has been reset to B, and must be changed again.

I have tested that this also occurs without any other mods installed. There does not seem to be any configuration file for Build Guide, which I thought may have been forcing the bind to a certain key despite my settings in the controls menu. It appears that this hotkey is unintentionally hard-coded.

I am running Build Guide 0.4.6 for Minecraft 1.21.8.

Hi, thanks for reporting this bug! I had heard about this bug earlier, so I've already managed to fix it in commit 06d91ae. The fix will be released in Build Guide 0.4.7. I've been waiting to get 1.21.10 in there, but that's currently blocked by waiting for a proper update to NeoForge and Parchment, so I might just wrap 0.4.7 up today or tomorrow instead.

I'll let you know when the fix is released!

The fix has released today!