Not sure this keeps happening but TUI keep seem to be having a problem with their Sunday night programme to Cyprus.
i am not sure if the scheduling and crewing teams are not building enough flexibility into the schedules this summer.
Second week of May Luton Paphos flight had a two hour slot delay so only operated outbound and had to wait for crew to have min rest before inbound flight could operate. Then two weeks ago a 3 hour tech delay on EMA - LCA again meant crew out of hours so flight delayed 24hrs then last night a 2.40 delay on EXT-LCA again crew out of hours so flight delayed 12 hours.
Just don’t seem to be seeing same problems with other carriers but do note some plan two hours between arrival of inbound aircraft before operating outbound Cyprus flights so any delays don’t eat into crew hours