The announcement that CX made to the HK Stock Exchange says:
Mr. John Robert SLOSAR has confirmed that he is not aware of any matter relating to
his resignation that needs to be brought to the attention of the shareholders of the
Company. He has also confirmed that his resignation is due to his retirement and that
he is not aware of any disagreement with the Board of the Company.
Given that Mr Slosar is recently on record in the SCMP thus:
In one of Slosar’s last public acts, he told journalists he ‘“wouldn’t dream of telling” the airline’s staff “what to think about something” after being pressed to rein in staff support for Hong Kong’s anti-government protests.
We must assume therefore that the remaining members of the board think likewise (otherwise CX has lied to the HKEX which would be a pretty major thing).
This doesn't bode well for the remaining members of the board.