Hang problem in ptp link because of restart!

Hi,
I have problem I would like to know if anyone else has the same issue or not.
after I upgrade my whole network from 5.26 to 6.25, I have seen very strange problem
in Two routers in two different site both have same issue!
whenever I restart the routers which you can see in picture the link related to them will hang up and you can not access any of radios(connected to the router). if you turn the bridge radio off and on nothing is work (after very short time bridge ping will be lost - station might connected).The only way to make it works you most turn off the station one and then turn it on. the link will work like charm!
Because of these problems I can not even restart my routers! my new finding shows that if I restart the station radio I will lost the radio on router the port will not plug until I turn the radio off and on(on the site)
Let me know if you have any idea.
PS: I check with 6.27 nothing changed!
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