Testsuite: Regression swing
Test name(s):ws/open/test/jdk/javax/swing/JTree/8038113/bug8038113.java
Product(s) tested: JDK 16b28 (64bit)
OS/architecture: Ubuntu20.10-x64(Light Mode)/Jtreg5.1b01
option: -Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel

Reproducible: Always
Reproducible on machine: Evergreen-machine
[If Sometimes] Also reproducible on machine:


Actual behavior:
1.The image didn't show correctly, refer to bug8038113.png.
2.There is no such issue without option,please refer to bug8038113-no-option.png
3.On Ubuntu20.10-x64 (Dark & Standard Mode) with the same option/build,the test has the same issue
4.There is no such test on JDK7u291b09&ws
5.There is the same issue on ubuntu20.10-x64(Light mode)/option with JDK8u281b09&ws / JDK11.0.10b08&ws / JDK15.0.2b07&ws