I never see this!! A configure a hotspot and when someone login, the MK crash! nothing access it, the keyboard stop, ony came back whith a reboot, ou poweroff .
I think is someone bug in the version, because whithout hotspot, ony wireless everybody access normal.
I had the same problem, I tried like 10 times to re-configure my MK box using Winbox, but always same happend.
Until I decide to start a fresh MK installation using just the terminal or console (no winbox interface).
I add interfaces addresses and create Hotspots manually by terminal.
I don’t know why but the MK start to work nice… so now I tried to don’t touch hotspot config by winbox.
In other hands I include in Hotspot DNS name the MK box local IP.
Those were the changes that I made to get the MK stop crashing.