ARC freezes and iPhone 13 gets hot

Roon Core Machine

Intel NUC10 Performance kit running ROCK (latest version)
512GB M.2 SSD (system)
2x8GB SO-DIMM RAM
8TB 2.5” SATA SSD

Networking Gear & Setup Details

Asus RT-AX92U
NUC connected with ethernet.

Connected Audio Devices

Macbook Pro, iPad Pro, Bluesound Node 2i but relevant for this the iPhone 13.

Number of Tracks in Library

225.000 tracks
mp3, alac, flac (very little above CD quality)

Description of Issue

The ARC app freezes and the phone gets very hot. It worked great from the beginning then after a couple of weeks this exact thing happened. Then you pushed out the latest update and everything worked great again (like 60+ hours in 4 weeks), up until now.

Closing and starting the app again doesn’t help, neither restarting the phone and reinstalling the app didn’t help either. Restarting the NUC and router didn’t help either.
From launching the app until it freezes takes about 8 seconds of scrolling, even on the settings page. Just checked and just opening and not touching anything makes it freeze. Music plays fine if it’s started before it freezes but the phone gets very hot.

Happens on both wifi and 4G.
80+ GB free on the phone, Arc documents and data is at 1.5 GB.

Since it takes weeks to manifest it might be something that accumulates over time, one would think that deleting the app would clear that up but it doesn’t.