Inner groups are flattened if you drag the tab onto itself

[Knebergish]

Steps to reproduce

• Open Firefox in a new profile
• Install Sidebery
• Create such tabs tree structure as in attached video: Root Group _ Inner Group _ Inner Tab Root Tab 1 _ Root Tab 2
• Drag "Root Tab 1" onto itself

Reproduce.webm

Actual behavior

All tabs from "Inner Group" group are moved to "Root Group", and "Inner Group" still have an expand/collapse animation.

Expected behavior

Nothing happens, or maybe at least something not like an actual behaviour.

System

Windows 11, Fedora 40 Kinoite (Wayland)

Firefox version

125.0.3

Sidebery version

5.2.0

Logs

Nothing printed to the console during this test case.

[the-nelsonator]

This one is incredibly annoying when it flattens a large number of groups and/or a large group.

[azizLIGHT]

I also reported on this issue before. I think it's the same problem https://github.com/mbnuqw/sidebery/issues/1293