Is there a servo output change in arduplane4.0.6 and above?

I had load arduplane stable version 4.0.5 into mayatek f405 WING and operate very stable,now I try to upload to fimware 4.0.6 and above,I found it can’t be connected with QGC Android version,when I flash back to firmware 4.0.5,some parameter changes(servo output change),the parameter should not be charged if just change firmware,DOES this the bug of new firmware?