Ps: You probably need a better name. Since your website says it is privacy respecting, 'UserTrack' doesn't exactly convey that. Just something with 'Track' not in the name.
And adblockers like uBlock Origin tend to block everything like track.domain.com.
And just a bug/overlap I noticed when hovering over the delete button - https://i.imgur.com/aBA7cpr.png
I did consider changing the name, but that's a lot harder than it seems (have to rebrand, change domain, probably lose all SEO, etc.). So far I didn't encounter any issues with ad-blockers (for users userTrack is self-hosted, so you can host it on any domain, so name doesn't matter there). I also rank highly for terms like "user tracking" which I think is good, as people would stumble upon a self-hosted alternative instead of some 3rd party platform like Google Analytics. In the end, it does track stats and users on your website, but if I were to start again I would indeed choose a friendlier name.
I am aware of that visual bug, I do have a better solution in mind for it, unforunately I have to write hacky code to make it work (due to the limitations of the material-ui library used). I think that's a very minor issue though, and there are more important issues I want to fix before it, especially that it's not an easy fix.