TX Power Stuck at 18dbm

please can anyone tell me why my wbs 210 and wbs 510 cant get to 27dbm after installing 18.0.6 no matter what country i change to its stuck at 18 dbm ?

No tpc --> -3 dBm.

tp link dish 30db 5ghz .... 17.01.6 works perfect with 27dbm until i upgrade to 18.0.6