Device MAC = random 1 of 2 choices every phone boot (?!)
My phone has two different possible MAC addresses that it can start with: sometimes one, sometimes the other (not hardware related because I never had this issue on LineageOS 16.0).
The device always connects to a WiFi network which I control, with WiFi settings always set to use "Device MAC" rather than a randomly generated MAC (default). WiFi connections always show the same MAC as in About Phone > WiFi MAC address
... i.e., the same random one of the two addresses. Therefore I assume it's the device "WiFi MAC Address" itself that is inconsistent.
I've also looked in the developer settings and can't see what would cause this. We need a consistent IP address on this device but can't work around the problem on our OpenWRT router because reserving a single address for more than one MAC address hangs DHCP on the router.
If there is a bug report for this, or if I should file one, please let me know where or how. If there's no fix I'd be happy with a workaround for now.
Nightly LOS 17.1 dated 8 February 2021 + Magisk 21.4
Reimaged recently from a full wipe with no substantial settings changes from the default.