Matek 405-WSE VTOL

VTOL is popular topic now and this is what I am trying, but I have strange situation in plane modes. In Manual mode RC-IN and OUT are same, this is good, when I switch to FBWA output reduced at around 25%. I never had this problem with Pixhawk and see this second time with Matek wing. Did somebody experience same problem?

P.S. For some reason in Throttle Disarmed output is very minimal.

Thank you.