The issue has been fixed, please reach out to our Support Team in case there are any actions pending.
GSuite transfers in from other providers are currently failing because of a side effect of the new transfer mechanics code deployed by G Suite. Google has acknowledged the issue and has engaged its Engineering Team to solve this at the earliest.
Here's the explanation of the root cause from Google:
"In short, as soon as a customer generates a transfer token with a reseller's public identifier, the full customer object is returned when that reseller calls customers.get. This is a side effect of the transfer token being tied to a target reseller but it is messing up the behavior of customers.get (which should only return the full data if the reseller owns the customer already). The team is fixing and adding tests so this regression does not happen again."
Affected Services