I don't know if they're all running on the same machine / virtual machine, but on the occasions mytrezor.com has been malfunctioning - balances not showing - test.mytrezor.com has worked fine.
Given that satoshilabs also operate dev.mytrezor.com, perhaps one of the testnet servers could be converted to a backup mainnet server.
It may be that the BoP backend has unresolved issues when running on mainnet that do not occur on testnet.
This is a great idea. Second server should fix the problem for most users because they could try the other one in case of first failing.
They should also have an automated service that detects the ptoblem and restarts the server. Or it could send SMS to stick.
Or maybe, if server always works for couple of days, they may have automated daily restarts.
Any eta on when BoP is going to be fixed?