Hyper-V AVDX File is creating automatically

I want to create the DR of our On-premise SAP Production Server on MS Azure Cloud through ASR. We are trying to initiate the initial replication, but we are getting the export config related error. On diagnosis, we have found that one AVHDX file is running & size is continuously increasing. We have checked the Host & there is no backup running on the same, still the avhdx file is continuously growing. We are looking for the help to find the RCA & help us enabling the ASR.