The secondary access point stopped working, turns out the date/time is wrong. You guessed it, the ntp server is hard-coded in the firmware (last version), no option to change it, it a linksys but not supported by openwrt.
Grabbed a second one, flashed with openwrt, same shit, and can't access by ssh because it's an old dropbear build.
Hate trashing things, but sometimes too much is too much 🍺