HDG on autopllot not turning in both B787 and A320 on #xbox s

Does anyone have an answer to my problem: After I engaged the autopilot and selected the HDG mode (which also does not seem to work) it does not perform any turns following a command, the only function available is the HDG/HOLD.

The LNAV function on the other hand works very well. This happens on both the 787 & A320. Any suggestions welcome.