Spotify drop out - any info from log file?
Only Sonos Staff can read your Diagnostic Report - to get feedback from that you need to contact them direct via this link: https://support.sonos.com/s/contact
You mentioned earlier that it was your TV audio output - so is it the Spotify App on your TV or a connected device? Your post isn’t clear about where you’re playing the audio from - which Spotify App is it?
If it’s not TV audio, but you’re perhaps using Spotify music from your mobile device then ensure your mobile is connected to the same WiFi access point as your main playback Sonos speaker and perhaps try using a fixed non-overlapping 2.4Ghz WiFi channel (eg: Ch 1, 6, or 11) with a 20Mhz channel-width, or if you are using SonosNet instead, then ensure it’s channel in the Sonos App is set to a completely different channel than the one chosen for the local WiFi signal.
You may find this support document perhaps helpful too:
WiFi Interference