Welcome to the forum and thanks for sharing that infoJust had a similar issue here for the first time (2 years of use). The Spotify Android app only showed my WiiM pro plus being available using Chromecast. The solution for me was to enable Chromecast on the WiiM home app (it was previously disabled), then go back onto the same tab and disable ,"send device usage " (this probably did nothing) and "allow google cast service". This then restored the direct Wiim ProPlus AD36 option in Spotify.