BTHome went dark for all devices

Configuration
1

I recently re-configured my HA from scratch in order to migrate from ZBDongle-P to SONOFF ZBDongle-E plus.
Once HA was up, all four Xiaomi Mijia LYWSD03MMC got connected automatically and were working fine for few weeks reporting temperature and humidity. Now they all went dark, BTHome doesn’t detected the devices, I don’t see any logs.
Settings > Devices & services > Integrations > Add Integration > BTHome > Shows “No devices found on the network”
Settings > Devices & services > Devices > Add Device > BTHome > Shows “No devices found on the network”

I saw the devices listed on Developer tools > Statistics, then I clicked on Fix Issue and deleted the devices. No luck reconnecting them.

Running HA OS 2025.4.2
Raspberry Pi 3

Any suggestions? Anywhere to check for logs?

2

What do you use as BTProxy receiver? ESPhome module? BT, built-in your Pi? Perhaps BT on your Pi died…?