Mod version: 1.7.0

Equipping an elytra or any other Curio back item* causes Backpacked to trigger the backpack opening sound.

*Tested with Industrial Foregoing's Infinity Backpack

I believe this bug may also be the reason I cannot open the Infinity Backpack when both Backpacked's and Industrial Foregoing's keybinds are bound to B - currently Backpacked's opening sound plays and no GUI opens.

I enabled subtitles to show the sound ^^

Thanks for the report. I find it funny how the GIF is not really helpful in this scenario as it's a sound issue 😂
You can rebind the backpack key in the controls (it's under Inventory category).

This should be fixed. I am assuming you are pressing B when the elytra is equiped?

Yes, it is fixed now! I was pointing out that the GIF was still helpful heh