Groom crash unreal usd

Ok, so why does Unreal 5.2 always crash when exporting usd that contains a groom?

groom export is not supported but crash should not happen.
Could you share a log of your export with us? It will be stored in the /Saved/Logs folder in your project.

Hi, The release notes of 5.3 mention that it’s now supported to import/export usd grooms however we can’t make it work. The Usd stage renders empty and the regular import gives an error but without a clear error message. Are there certain caveats to make this work?

Thanks in advance, all the best.

Ralph