Desktop entry Exec command does not launch .jar's correctly

[Lithi]

Exec=cautious-launcher %f /usr/bin/java -jar

This is not launching jars correctly.

Says "/usr/bin/java -jar hellofx.jar: '%f' is not executable. Aborting." even though the jar can be run manually with 'java -jar hellofx.jar'

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: openjdk-11-jre 11.0.7+10-3ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Tue May 12 21:44:00 2020
SourcePackage: openjdk-lts
UpgradeStatus: Upgraded to focal on 2020-04-25 (17 days ago)

[Lithi (lithi)]

Note that I also tried chmod +x hellofx.jar but still get the same error.

[Vladimir Petko (vpa1977)]

Unable to reproduce the issue with 11.0.20+8, closing as Invalid.