It sounds like a bug of some kind .. but it's not a LibreELEC bug, so best to post it in Kodi forums for their devs to triage.
Yep, I thought so, still it's something that drives me kind of crazy. It doesn't happen on the kodi instance I have on Windows (it's the same-ish version) it happens only on the kodi that runs on the raspberry and I tried posting here to make sure it not some specific LibreELEC config..
I'll do as you suggested and try on the Kody communities, thanks