When dragging between TabContainers, the control does not move

[RodZill4]

Godot version

v4.2.beta3.official [e8d57af]

System information

Godot v4.2.beta3 - Windows 10.0.22621 - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 2060 (NVIDIA; 31.0.15.3713) - Intel(R) Core(TM) i5-10400F CPU @ 2.90GHz (12 Threads)

Issue description

When dragging between 2 tab containers, the tab is moved, but not the corresponding control.
This look like a regression in b3 (did not notice it in b2).

BTW, it does not seem possible to drag into a TabContainer that does not have tabs. Not sure if this is intended (it is still possible to workaroung by handling drop in the empty destination TabContainer).

Steps to reproduce

Using the minimal project, drag a tab from a TabContainer to the other. The corresponding control "vanishes". Dragging the tab back seems to show the control remained in its original location.

Minimal reproduction project

TabContainerBug.zip