Yes, both phones do have the same yatse version: 8.5.5a/310654. And they had the same Yatse settings.
I did not try to reinstall Yatse on the new phone, but I will do now.
One remark regarding the old phone: I am able to stream content (audio/video) but when i play a music album via chromecast it usually stops after 2…3 songs showing again the error “no compatible format”. Then I initiate the playback again where it did stop and then it works again… after 2…3 songs playback stops again