There was a vulnerability in the HTTP/3 QUIC code.
The guy didn't want to make a CVE for it since it was experimental.
The F5 team said the customers must know.
This, of course, is after all the other devs left way before, during the acquisition.
statement from the dev.
follow-up about the other fork (by the other devs in question (still for-profit)) and approach to collaboration.
statement from an F5 employee.