RichTextLabel "Scroll Following" randomly stops working

[Gamepro5]

Tested versions

4.2.2

System information

Godot v4.2.2.stable - Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 3080 (NVIDIA; 31.0.15.5222) - AMD Ryzen 7 3700X 8-Core Processor (16 Threads)

Issue description

The RichTextLabel "Scroll Following" property randomly stops working. This happens even when threaded is off. Custom script workarounds that automatically set the scroll value to the maximum also fail to work, even when call_deferred().

Steps to reproduce

1. Run MRP
2. Click play
3. Type things into the window
4. Observe as the window displays new content
5. Scroll up a bit
6. Scroll back down
7. Repeat step 3
8. Observe as the window fails to display new content.

Minimal reproduction project (MRP)

ScrollBarBug.zip