I've update a couple (±30) of RB2011/RB3011's hAP AC^2's and wAP AC devices from 6.43.4 to 6.43.8 and until now I got 2 wAP AC devices in an undefined state right after/during the update (update via capsman), they would not boot anymore. Luckily I'm able to power cycle these devices via PoE switches...