I confirm the exact same problem as olivierruau
Perfect leveling (0.1), no wind, no vibrations, clear skies, limited sky rotation (medium object altitude, west, past the apogea), bahtinov mask focusing, etc.
I sent you a log of a recent capture I made, which showed a rejection rate of 65%. Your colleague was unfortunately not very keen to help. You asked me to send you yet another log, which I intend to do soon, but in the meantime I hope seeing that other users are affected will encourage you to take the matter in analysis.