Certainly on my Samsung Galaxy Tab-A Tablet. Response is horrible 20 seconds to have Sirius stream playing. Typically the app puts up a set up screen, “no Sonos devices found’, then maybe it finds the network, then maybe it puts up the devices, maybe it responds to may touch.
Noticed now a behavior when I had two devices in a group, I tried to remove BOTH from the group - yes, stop playing in both locations - I get an endless loop of “nothing will be playing” Cancel or “GOT IT”. It does NOTHING. I can remove one of the devices, but trying to remove both (a scenaio that has worked in the past), is now a FAIL.
In they’ve made improvements in the app since October, totally transparent to me, specially on the Galaxy.