I have several RB433AH boards, they all exhibit the same issue, when a radio card is inserted they remain stable until something tries to connect to the card, then the boards partially lock up with interfaces vanishing from the winbox etc.
I have tried 2 different R52 boards and an R52Hn board, all cause the same issues in all the RB 433's.
I have tried with everything up to an 18V power supply with no change in stability.
This is quite ridiculous. Latest stable RoS is installed. (4.11)