This seems quite similar and/or an follow-up to JAVA-3575 that still exists as of version 3.12.1.

The manifest.xml of mongodb-driver-sync declares a required import of

com.mongodb.crypt.capi;version="[1.0,2)" 

... which would be provided by mongodb-crypt

This is odd for multiple reasons

1. Is mongodb-crypt required at all, even if not using any client side encryption?
   1. My unit-tests (not using osgi, so ignoring manifest.xml) seem to work without it and
   2. JAVA-3575 more or less hints that it should be optional.
2. mongodb-driver-sync does not maven-depend on it (https://mvnrepository.com/artifact/org.mongodb/mongodb-driver-sync/3.12.1) at all.
   1. To some degree it was an optional dependency before JAVA-3575 via mongodb-driver-core.
   2. Currently there is no maven dependency at all. So, without manual addition, it won't run in osgi.

Probably 

com.mongodb.crypt.capi;version="[1.0,2)" 

should be declared optional?