Recently installed 16.4.4. Expert a/p mode. I routinely decouple trk/hdg with the ap panel basically leaving a/p in altitude hold while I meander around the sky viewing the scenery or allowing a passenger to steer the aircraft. After 16.4.4 the trk/hdg buttons will now not disengage either mode when depressing. I am able to engage with either button. Using through efis, the on screen trk/hdg buttons work normally. Anyone else experiencing this issue?