Bookmarks duplicate on new window (sometimes)

[osir]

Captchas

• I have read the instructions.
• I have searched existing issues and avoided creating duplicates.
• I am not filing an enhancement request.

What happened?

I just upgraded to 1.7b and the issue is still present. Ever since the previous update (not 100% sure to which version) the bookmarks bar duplicates inconsistently when opening a new window.

• In the screenshot you can see the first window at the top has the normal bookmarks.
• Then, the second window is also correct.
• The third window duplicated the bookmarks but the left most one is missing (no favicon/globe icon).
• The fourth window has the bookmarks duplicated but the left most bookmark appears twice (maybe there is the entire bookmarks bar in between the first bookmark and all following bookmarks?).
  

Windows 10 22H2 19045.5371
Zen 1.7b (Firefox 134.0.1)(64-bit)

Reproducible?

• I have checked that this issue cannot be reproduced on Mozilla Firefox.

Version

1.7b

What platform are you seeing the problem on?

Windows

Relevant log output if applicable

[osir]

This also happens when I moved the bookmarks toolbar items back into the bookmarks toolbar.