pattern_is_full I have read the Flight Operations Telex (FOT FOT-999.0059/19) sent out by Airbus which prescribes the CG restriction to affected airlines. Their explanation is clear, n.b. the 1) 2) and 3) above are nowhere near the real thing.
Admittedly for the A320, this is the relevant AD
https://ad.easa.europa.eu/blob/EASA_...AD_2019-0189_1.