Why is the input I type in the Search Folder bar random?

I recently noticed that when my browser opens a folder to upload/download a file and I attempt to type something into the "Search Folder" field, the letters typed into there will be completely random. I will press the "A" key a few times, and what's written in the search bar is, "r0z3ym1y6vm3".

This happens with both Chrome and Firefox, but not if I open the folder normally, outside of a browser.

How can that be? I use Windows 10

Update: I managed to turn off Sophos and it fixed the issue, so I'm going to assume it's an issue with Sophos and contact the support there.