Altitude asl is the same as relative altitude


I’m currently facing a strange problem.
When I connect to my Copter via MP and switch to the status tab to see all data comming via mavlink I see the same altitude for atasl and alt (See picture):

However when I analyzed the log file the altitude asl is correctly logged.
Is this a bug form the MP?

anyone ???
GPS Status 3, 9 sats but no altitude whats wrong…
(ublox m8n)