Arc freezes (iPhone) after the upgrade

Roon Core Machine

Rock / i7 / 16GB

Networking Gear & Setup Details

1G

Connected Audio Devices

XMOS

Number of Tracks in Library

700K+

Description of Issue

Arc freezes after I play a track. Music keeps playing though. Just the screen that gets frozen. It seems to freeze more frequently if I swipe the screen vertically to scroll tracks. I think this freezing symptom is occurring much more frequently after the latest update. Currently Arc is not usable at all. At times it appears that the machine is running extremely slow. In other words, control returns after 10s of seconds have elapsed. Please help.