I have recently distributed a JavaFX application as an MSI installer for Windows which was built via jpackage and jlink. For the tooling and the runtime created via jlink I used the latest release candidate of JDK 15.
Installing and running this application works nicely for me on my machine
but soon after the release I got several bug reports from customers that,
after the installation when the applicaiton is started, it dies immediately
with an EXCEPTION_ACCESS_VIOLATION. But I also got feedback from other customers who did not have this problem and could run the application without problems like me. I also created installers for Linux and Mac and did not get any bug reports of that kind. To temporarily resolve the issue I went back to JDK 14.0.2 where these problems did not show up.

I have attaches two of the hs_err_pid... files I got. On request I could also make the problematic MSI installer available.