IPIP tunnel and mikrotik management

Hi all. Can you help me. I created IPIP w/IPSEC between two mikrotik.

And I have a problem with connection to a public ip of second mikrotik behind a first.
I can connect via ssh, but in sevral seconds a console freezing.
I can connect via winbox but when opened a miktorik gui all window is blank and in several seconds a connection is lost

Both mikrotiks has a 6.30.2 packages.

Is it normal or is it a bug?

Also using private ip’s all working well