Tablet recognized as phone

[matrixcro]

I'm free user and I have Nvidia SHIELD K1 tablet that is recognized as phone, which means that I can't play songs on demand anymore and I can't control my tablet with phone.
I'm using latest version of Spotify (8.4.0.539) on Android 7.0 (Nvidia SHIELD K1 is relatively well-known tablet with screen bigger than 8").
I have been using Spotify on the tablet for a few months and everything was all-right. It might be version-related bug. I noticed the bug this morning after some time of using shuffle mode so I can't tell exactly when did it happen, but I checked latest version reviews on Google Play for this device and I saw that I'm not the only one with the issue.
I've tried uninstalling and reinstalling but it doesn't help.
There are some threads similar to this, but I haven't seen a solution there. People suggest the OPs to fill some form that I can't find (on Technical issues -> Other -> Android). What shall I do?

Thanks for help!