From Day one my mesh system has only had issues with iOS iPhone devices. It goes like this.

Speeds are wonderful, connected, full WIFI bars on iPhone. Testing speeds upwards of 600 mps download and upload is fine.

All of a sudden, the phone still shows full WIFI but cannot connect to the internet and barely can do 1 mps download when testing speeds when this happens.

I have updated the DNS to 8.8.8.8 and 8.8.4.4 with no change. I have tried leaving mesh on and trying it with it off, no difference. It happens at least twice a day.

I've read plenty about this issue online and it seems no one really knows how to fix this. Any help would be greatly appreciated.

No other devices on our system have an issue, just our iPhone 13 pros.