@garycnew
Thanks for all the useful input!!
On the real question: the second connection was just a backup line, but was upgraded to gigabit for less than 4$ per month. The first connection, Telenet, is getting notorious for local connection ruptures. Also on the second one, there are regular...
@therealrav @OpenSpeedTest
I have the same dual WAN failover/failback issues with my RT-AC88U (with AIMesh enabled) and after reading the above ordered the hEX RB750GR3. So not yet any experience with WinBox/RouterOS. Device will be delievered tomorrow ...
My connections are Cable 1000/40...