I’m having a problem when winbox disconnect from a routerboard , when i hit reconnect it shows that reconnecting is successful and don’t show the window and back to the reconnect menu after few seconds like the picture below

I didn’t had this problem on older winbox versions (v 3.11 for example which i’m using for now), maybe it’s related to forcing the secure mode?
*tested this on 6.40.9 and earlier
*using ip, mac or romon the same issue
*tested on another PC
Thanks in advanced.