That happened on the Hope Valley line on Monday.
Very frustrating(!!) for the lady waiting at Dore with 2 young children and large pram for train into Sheffield for connection to Stockport.
While she waited EMR trains went into Sheffield in both directions, from and to Stockport- but they don't stop at Dore! Her planned Northern service also went through, empty, no guard. (It doesn't go via Stockport hence need to change). She called an Uber and was standing in the rain waiting for it.
That's a west side issue. Conductors.
Sheffield and east side seems to be a driver shortage. Don't all rush, it'll take many months to resolve that but you can apply from this link;
https://northern.engageats.co.uk/Va...m1OADlFyWEpHqY0hwg_aem_RreuOo-PGlu9hoIrxY0-WQ
Looking at that no wonder it takes a long time to fill gaps. There's no sense of any urgency.