Godot 3.5 Filesystem Dock cannot be completely resized at Projectstart

[OlafausBerlin]

Godot version

Godot 3.5.stable.official.991bb6ac7

System information

Windows 10

Issue description

After loading my project the Filesystem Dock can only be resized in one direction.
I have to click the import settings Dock and then resizing works in both directions.

Godot.3.5.Filesystem.Dock.mp4

Steps to reproduce

Load a Project and try to resize the Filesystem Dock.

Minimal reproduction project

Filesystem Panel Problem Godot 3.5.zip

[Calinou]

Can you reproduce this in 3.4.5?

[OlafausBerlin]

In 3.4.5 it works perfect.

[Calinou]

@OlafausBerlin Can you reproduce this in any of the 3.5 betas and RCs to determine when the regression started?

[OlafausBerlin]

I´ve tested some of the RC´s and betas and the problem started with beta1.

[OlafausBerlin]

The problem is still there in 3.5.1 RC1