Interesting. There was a change to

medplum-provider

which started adding the profile "http://medplum.com/StructureDefinition/medplum-provider-lab-procedure-servicerequest" to

ServiceRequest.meta.profile

in some cases. However, Medplum server silently ignores profiles when the profile URL is not found. Are you running against

api.medplum.com

or your own dev server?