Recttransform UI PosY 0 reset Bug [Editor and Android] 2023.3.4f1

So I ran into this super weird issue where Unity resets an UI elements Y-axis position when I anchor it either to the top or bottom of the canvas. This happens with every restart.
So for example, if I create a new image within the canvas at 30, 25 and anchor it to the bottom center, then after I restart the editor the image is moved to 30, 0.
(This phenomenon also exists in the editor. and even after build, this phenomenon also exists in Android.)

Same here, it’s a bug; happens on all platforms when you choose stretch


Would you kindly please report this issue via the Bug Reporter tool?
Please make sure to write the exact steps needed to be taken so that the reproduction would be visually seen. Also make sure to attach a reproduction project and any visual material so that when testing our CQA team can verify that they got the same results. If you can, please use this template:

How to reproduce:

  1. Open the attached project
  2. Do this
  3. Do that
  4. Select this
  5. Observe that

Expected result: Something is visible, something is printed or something happens
Actual result: The opposite of what I expect happens

Reproducible with: Editor version I am using (e.g: 2021.3.xf1)

Reproduced on: The OS I am on (e.g: Windows 11, macOS Ventura 13.1 (Intel/Silicon))

(Edit: This bug was already known and is apparently fixed in 2022.3.5f.)

This is indeed a bug that can be reproduced with very minimal effort, so I submitted a bug report.

However, I was unable to reproduce any problems in builds.