OK. Pax on board, luggage loaded, doors closed, so the Jetway undocks.
Then I select pushback and spontaniously: beep, beep, the Jeway docks again.
It happened on P3Dv4's default EGCC and on Fsdreamteam's LSGG. Both kind off busy and crowded airports if that has something to do with it.
Might be a bug.
Dirk