I am using mongoDb's CSFLE to encrypt sensitive data.  I want 13 fields to be encrypted and I am using 13 separate keys for encrypt these fields.
After integrating FLE, I have found that memory usage of the node process was increasing rapidly and finally results in crashing the server. Without FLE there is no issue.

We are using following setup:

• MongdDb Atlas
• mongoDb node driver 3.6.4
• mongoose 5.11.8
• mongodb-client-encryption 1.2.1

I can reproduce this in my local machine using some load test tools like Jmeter.