The problem

For some reason switching my branch on a particular repository is failing, then changing thousands of files which take minutes to revert.

Release version

3.5.2 (x64)

Operating system

Windows 11

Steps to reproduce the behavior

1. Clone https://github.com/vicdotexe/Gum locally
2. Fetch and make sure you are on master
3. Attempt to switch branch to origin/vic/theming-new
4. Wait a moment

Observe Problem 1: Message about submodules
Observe Problem 2: User is switched back to master rather than the desired branch
Observe Problem 3: Thousands of files have changed

Expected behavior: User should be on the new branch, with no local changes, if necessary submodules pulled

Log files

2025-09-14.desktop.production.log

Screenshots

Additional context

This repository is a fork of one of my own repositories, but I have it cloned to a totally different folder so it should not interfere.