Switch reboot

[Saint George]

Ideas anybody?
I fitted 2x Ceragon ip20 today, all fired up good on 48vh, on same site.
Syncing 1gig and 40 watts draw.

All vlans added ok, and site up. 10 mins later switch reboot, changed switch out all working again and rebooted again. Firmware 1.5.8

Put the poe back in and now ok. From this I would surmise they are incompatible, contrary to listing on forum user experiences.

Prior to this I fitted the same set up with one radio last week, it was ok until a similar time today. Then rebooted twice.

Have read about flow control and loop protection.
It's also powering Mikrotik ccr.

Any pointers?
Rgds