Roon Core Machine
QNAP TS-453A
Networking Gear & Setup Details
Unify switch/WiFi
Connected Audio Devices
8 Linn streamers
6 Sonos streamers
Number of Tracks in Library
50,000 tracks
Description of Issue
App on iPhone crashes and closes consistently 60 seconds - 120 seconds after opening. Happens at all times, searching, modifying groups, even just adjusting volumes.
Been happening for around a month. No problem with non iPhone control points.
QNAP NAS server, iPhone & entire network shut down and rebooted. No improvement.
Please advise how I might fix (or is this a know version issue?)
Hey @Peter-Marc_Fortune,
Thanks for taking the time to write in! It sounds like you’re experiencing a known issue we’re actively working on. You can learn more about it here : iOS devices crashing shortly after startup [See staff post] - #453 by Benjamin
That said, we also have a workaround we are testing (you’ll notice more on it if you read the bottom of the thread I shared) let me know if you are interested in having this bit flipped on your device 
In my case the iOS app is extremely laggy to reconnect to the core upon resume, eg it can take quite a while for the now-playing track info to update. Problem introduced on the most recent release.
Thanks @benjamin the fix works for me!