I remember a couple of years ago the Morgan Three Wheeler Club giving members a warning that some had spotted licence renewals coming back with the classification to drive 3 wheelers removed
If you go looking there is a lot online about DVLA messing up licence renewals including:
LGV drivers losing their jobs when the licence came back without the appropriate class of vehicle
Motorcyclists having to re-take a bike test
Coach drivers losing jobs
Advice is - always keep the old licence when you apply to renew. Never ever send it to DVLA - they will not accept a photo of a licence as proof of entitlement to a specific class of vehicle.