Problems Antenna at Port5 of HAP AC lite is not seen (SXTSQ5 or Ubiquity M5)

Initial situation: 
Mikrotik hap ac lite and mikrotik sxtsq antenna bought new, flashed to 24.10, 
connected to port 5 of the HAP. 
Antenna not visible in dtd (not even after a long wait!)

Same using an brandnew Ubiquity M5. same problem as with the Mikrotik SXTSQ. Not seen in dtd either. 


Workaraound:

I flashed down both my new HAP ac Lite and the antenna back to 23.8. dtd is suddenly there!
Everything seems OK.

Then flashed again to 24.10, dtd stays and works.
This means that there must be a bug in 24.10 (VLAN). But in migration takes the good config with it 
when migrating from the old version and thus circumvents the problem.

Or to put it another way: don't initially flash new devices (antennas and also HAP ac lite) with 24.10 
but instead take 23.8 and then upgrade.

Hopefully this helps finding the bug!