Web / app access freezes system from Moasic beta

[clue9]

This looks like a network issue of some sort. Can you provide what you get in System Config > Status > System log?

Here is the current log. Note i did a factory reset some days ago. No new listing here.
System is a microtik RB1200 router, with a HP aruba 2530 48G PoeP switch. Lm is not supplied with poe , it's a separate powersupply from Schneider supplying it. 
Wifi network is also aruba, mobility controller 3200  running 8 accesspoints.