Having an odd issue with my brand new M8, which is completely stock. Few days ago I've received an firmware update (220.127.116.11 / German T-Mobile CID) for my handset. Since that update I'm not able to use Google Play Music while connected to my wlan network. It seems like, that Play Music is not able to recognize my fully functional connection and therefore refuses to download and/or stream music.
All other apps (including Spotify) are able to use my wlan connection without any problems.
Turning wlan off helps to correct that error, but that workaround burns away my included traffic
Here's what I tried without success:
1. Did a factory reset
2. Deleted all wlan connections and reconfigured them
3. Cleared Play Music's caches
4. Contacted HTC (recommended the factory reset) as well as my provider (didn't have a clue)
5. Checked the number of eligible devices with Google (currently 3 out of 10)
Now I'm a bit puzzled on how to solve this issue and wanted to ask, if anybody did experience (and maybe solved) this issue.