Tab-completing "/me" moves text cursor to beginning of line

[Anonymous1157]

Describe the bug

On Firefox, typing "/me" and then pressing tab to engage the slash command moves the text cursor to the beginning of the line, as in the very beginning, before the "/me". This doesn't happen in Gnome Epiphany (the webkit-gtk browser).

Reproduction

1. Open app.sable.moe, find room where you like to express yourself with silly roleplay actions
2. In the text input box, type "/me", press tab, continue typing your message without looking according to muscle memory, observe that the "/me" is now at the end of the line

Expected behavior

Engaging a slash command should put the text cursor at the end of the line, not the beginning.

Platform and versions

1. Gentoo
2. Firefox 148.0.2
3. Sable 1.9.3 (app.sable.moe)

Additional context

/me wishes there was an option to turn off tab-to-engage as she would have turned it off long ago while still using Cinny

[mini-bomba]

Appears to be fixed on the dev branch