Thanks for reporting this. A few questions that can help us troubleshoot this:
Is it the Monitor page or your Power App which is getting frozen?
Where are you launching Monitor from (within an editing session of the Power App, directly from the list of apps, elswhere)?
If the Power App is what is frozen:
1. Go to your Monitor page.
2. Click the gear icon in the top right corner.
3. Pick "Session details".
4. Copy the "Session ID" and provide it here.
If Monitor is what is frozen:
1. In Play mode for the App, hold the "ALT" key and right click inside of the Power App.
2. Click "Session details".
3. Copy the "Session ID" and provide it here.
Thanks!
