Cross-account DR may fail with the RequestLimitExceeded error

Cross-account DR may fail with the "RequestLimitExceeded" error

The Cross-Account DR may fail with the following error in the Backup Log:
 Error,"Volume DR copy snapshot failed for region <Region Name>, snapshot snap-<Snapshot Number> (to DR account). Reason:       Failed adding share permission to snapshot snap-<Snapshot Number> (original volume:Volume Number>) Failed. Reason: BotoServerError: 503 Service Unavailable RequestLimitExceededRequest limit exceeded. "

Please upgrade to latest 2.X.X version to resolve the issue.
Reference defect number - 3c885092e4, fixed in v2.1.2