I was working with some old Java apps which use the Nimbus theme, when suddenly this buggy controls make an appearance:
This started happening when I updated from OpenJDK 8 to OpenJDK 11 (I am working on Linux).
Everything else works as expected, including other themes.
I tried reinstalling OpenJDK, no improvements.
Is this an isolated case? Any ideas about how could I solve it (I cannot downgrade to JDK8)? (See edit)
Edit (2019-05-06)
I have tried the same binary in a clean virtual machine, and it works perfectly well, so I guess I might have a problem in my system.
I have KDE Neon 18.04.1 64-bit, GPU AMD RX470 with default drivers.
Any ideas?