Horizontal layout vertically offsets child UIs

[clembu]

Describe the bug

When laying out horizontally a series of allocated vertical layouts, the child uis are offset and un-aligned.

To Reproduce
Steps to reproduce the behavior:

1. Clone the reproduction repo https://github.com/clembu/egui_horizontal_offset_bug_reproduction
2. Run the executable: cargo run
3. ----> The children are vertically offset

Expected behavior
The lists are aligned horizontally, as they are all the same size.

Screenshots

Desktop (please complete the following information):

• OS: Windows 11
• Browser: N/A
• Version: Windows 24H2 Build 26100.2605

[clembu]

It's probably worth mentioning:

This only happens if the child ui is allocated with not enough vertical space, therefore having to grow.

When allocated with vec2(arbitrary_width, ui.available_size().y), the problem does not occur.