I’m curious if your phone is losing connection with the Bridge, or if the Bridge is losing connection with the WiFi.
Some of us in the community have noticed the WiFi channels your router is using are often involved in unreliable connections or setup issues.
But since you mention the phone is a 5 GHz connection, and Bridges only use 2.4 GHz, I’ve seen some Android devices have trouble with various smart home devices bridging across the mixed mode networks (even if they’re on the same WiFi network & the channels for 2.4 and 5 GHz are named the same SSID) - never a Bond Bridge in my case, but it’s worth considering.
In the Bond app, if you are NOT in a device setup screen, scroll to the Bridge, tap it, then tap Advanced to expand additional information. Then tap the Network Info section and see if if says:
Connection Type - WiFi
Status - Connected to Cloud
IP Address - x.x.x.x
If you see all that, you can try typing in the IP address into a browser on the phone or a computer (on the same network), and see if you get a screen asking for either the Bond 4-character setup PIN or the 16-character Account code.
Don’t forget there are options for official support in the app (under Help) or via email (customerservice@olibra.io) which may lead to faster answers if we in the community can’t point you in the correct direction.