RB941-2nD (hap lite) brick after upgrade from 6.46.8 long-term to 6.47.9 long-term

RouterOS General
1

We have a bunch of RB941-2nD (hap lite) routers (8 out of 30 routers) that broke after /system package update install

They just didn’t boot up normally after upgrade. It seemed like a bootloop, because switch functions appeared to be working for a second (we tried to ping other devices downlink the router, 1 reply in 5-10 minutes).

We could not connect to diagnose, so just did netinstall and then restored config from binary backup we had from before upgrade.

Just a warning for those, who might want to upgrade a remote router: make a backup and be ready for a ride to netinstall.

2

10 out of ~100 hap lite were bricked during upgrade from 6.46.8 to 6.47.9 and required netinstall. One of them worked after upgrade but bricked 1 day later with the same simptoms (constant reboot every 10 seconds).
Other models were not affected, only hap lites.
Seems like the same simptom: http://forum.mikrotik.com/t/v6-47-9-long-term-is-released/146764/1