Meta AI app doesn't see the glasses after a while

This started about 2 - 3 weeks ago. The MetaAI app (iOS) does not see the Vanguard glasses. The glasses power up and connect via bluetooth fine. I'm able to play music on them and make a phone call if I use the Music and Phone apps on the phone.

The temple controls (single and double tap along with volume up / down swipe do not work. 

Using any "Hey Meta" commands results in the glasses saying the Meta AI app is not responding and to make sure its running on the phone (it is). 

I have tried the following:

1. Unpaired and repaired the glasses. 

2. Powered the glasses on and off (press till a blinking red LED). 

3. Restarted the iPhone

4. Uninstalled and re-installed the Meta AI app

5. Erased and reset the glasses

The glasses are on the latest firmware (at least there are no updates available for them).  The MetaAI app is on the latest version and iOS is up to date. This is on an iPhone 17 Pro. 

Every time - the glasses work for a few hours, then the next day  the app does not recognize the glasses even though they are paired and connected to the phone.  Unpairing and repairing the glasses, through the app, resolves it for a few hours.