Chromecast won't connect

[Silva579]

Never had problems over the last couple years. Android on galaxy s8+.  When I try to connect to the Chromecast in my wife's living room, it shows up and I select it, the tv shows the spotify logo for about 30 seconds then exits. Factory reset phone, factory reset Chromecast, restarted modem and router several times, cleared all data  and every cache I could possibly think of, just does the same thing every time. Meanwhile another Chromecast, same model, on my home network with same same exact modem and router and isp, works fine for me every time using the same phone. I give up. Please help

[Silva579]

Forgot to mention every other app I cast to this Chromecast works perfect, only Spotify fails. Also wife's phone (lg g6) casts to it with her own Spotify account every time, no problem.