[Inline Tab] Suggestions ignore the last letter when pressing tab quickly after typing

[Codelefant]

With Inline Tab, the list of suggestions that appears when pressing tab ignores the latest letter if tab is pressed quickly after typing the last letter. It seems to require a little bit of time before registering a typed letter.
Example:
I try to complete "Pog" while a user called "Paccut" is in the chat.
When I type "Po" and then quickly press tab, "Paccut" is the first suggestion (and everything else that starts with "P". But when I type "Po", then wait for a split second and then press tab, the corect suggestions (e.g. "Pog") are shown.

I am using
FFZ Version 4.33.5 (82a34cd) in
Firefox 100.0 with
Inline Tab Version 1.2.4

[doubledgedboard]

This seems to be an issue with twitch in general ever since they added the inline emotes