Powerbox Pro not reliable?!

Hi,

my first PowerBox Pro lasted for about three months before PoE suddenly failed. It showed “overload” on all ports - even on unplugged ports.

I ordered a replacement PowerBox Pro. This unit worked from mid-August until today. Two months and again PoE problems: the PD device starts, PoE turns off; PD starts, PoE turns off - repeatedly. I tested with different PDs on different ports of the PowerBox Pro with the same result.

Was I simply unlucky, or are these devices not durable? The device was installed on my balcony, not on a tower or directly exposed to rain, etc.