Currently, the tenant oplog batcher restarts from scratch if the last noop entry we find in the oplog is less than startApplyingDonorOpTime. SERVER-53509 will build the oplog chain for retryable writes when writing out noop entries and we do this even for oplog entries that are less than the startApplyingDonorOpTime. If we resume from the beginning, we may process those retryable writes multiple times.