This is an issue with Obsidian on Android mobile, but the https://forum.obsidian.md/c/mobile/18 link in the bug report form is broken.
I have community plugins and custom CSS disabled.
When I have a long list of checkboxes, if the keyboard focus / cursor is off the screen and I check a checkbox, it will jump down to where the cursor is. This is very annoying - I use Obsidian for todo lists, and checking things off becomes a pain.
See https://photos.app.goo.gl/PZCLaAaiWma26qW56 (should be world viewable) for a repro video.
Make a checklist on a note that that exceeds one screen length
Leave the cursor and scroll up or down to check a checkbox
Check the box
Observe the screen jumps to where your cursor is (off screen) and the checkbox is checked
Checkbox is checked and screen stays where it is
screen jumps to where your cursor is (off screen) and the checkbox is checked
Obsidian 1.4.6 (105), API v 1.3.3