alt-9 binding behavior changed

[OmeletWithoutEgg]

Version info:

         ______     ,,
    ,.-"`      | ,-` |
  .^           ||    |
 /    ,-*^|    ||    |
;    /    |    ||    ;-*```^*.
;   ;     |    |;,-*`         \
|   |     |  ,-*`    ,-"""\    \
|    \   ,-"`    ,-^`|     \    |
 \    `^^    ,-;|    |     ;    |
  *;     ,-*`  ||    |     /   ;;
    `^^`` |    ||    |   ,^    /
          |    ||    `^^`    ,^
          |  _,"|        _,-"
          -*`   ****"""``

qutebrowser v3.1.0
Git commit: 
Backend: QtWebEngine 6.6.2, based on Chromium 112.0.5615.213 (from api)
Qt: 6.6.2

CPython: 3.11.8
PyQt: 6.6.1

Qt wrapper info:
  PyQt6: success
  PyQt5: not imported
  -> selected: PyQt6 (via autoselect)

colorama: 0.4.6
jinja2: 3.1.3
pygments: 2.17.2
yaml: 6.0.1
adblock: 0.6.0
objc: no
PyQt6.QtWebEngineCore: 6.6.0
PyQt6.sip: 6.7.12
pdf.js: 4.0.379 (/usr/share/pdf.js/build/pdf.mjs)
sqlite: 3.45.1
QtNetwork SSL: OpenSSL 3.2.1 30 Jan 2024

Style: Breeze::Style
Platform plugin: xcb
OpenGL: Intel, 4.6 (Compatibility Profile) Mesa 24.0.2-arch1.2
Platform: Linux-6.7.9-arch1-1-x86_64-with-glibc2.39, 64bit
Linux distribution: Arch Linux (arch)
Frozen: False
Imported from /usr/lib/python3.11/site-packages/qutebrowser
Using Python from /usr/bin/python3
Qt library executable path: /usr/lib/qt6, data path: /usr/share/qt6

Paths:
cache: /home/omelet/.cache/qutebrowser
config: /home/omelet/.config/qutebrowser
data: /home/omelet/.local/share/qutebrowser
runtime: /run/user/1000/qutebrowser
system data: /usr/share/qutebrowser

Autoconfig loaded: yes
Config.py: /home/omelet/.config/qutebrowser/config.py has been loaded
Uptime: 0:06:53

Does the bug happen if you start with --temp-basedir?:
Yes.

Description
<alt-9> binds to tab-focus -1 in the default setting. And when I :bind to check it says so too.
However when I really press <alt-9> it switches to the 9-th tab, instead of the last tab.

btw, I bind <alt-f> to :fake-key f to send f key as in insert mode, but sometimes when I press it I will be switched to another tab (like 10-th or 13-th?) and this is kind of annoying. Can't reproduce it with --temp-basedir though, don't know what happened.

How to reproduce

open for about 15 tabs (at least 10), and press <alt-9> or :fake-key <alt-9>

[The-Compiler]

Works for me. Can you reproduce with --temp-basedir and do :report so I can take a look at the logs?

[OmeletWithoutEgg]

Sure, I've done :report and send the log out.

I also found that :fake-key <alt-9> will bring me to 9-th tab and :fake-key <alt-9> -g to the last lab.

edit: here is another reported log, uploaded to gist.

[The-Compiler]

First thing coming to mind:

QT_IM_MODULE = fcitx

could you try if it reproduces without that?

[OmeletWithoutEgg]

Yes, it reproduces without that envvar.

[OmeletWithoutEgg]

here is the log without the fcitx envvar.

Also I found that, pressing like <Alt+d> and <Alt+f> will bring me to some tab with title start with capital D and F, if there is such tab (for example DuckDuckGo). Is that related to this?