The issue occurred because the skin marks the button cell as “empty” when the value becomes null. With the fix clearing the ComboBox value re-shows the prompt text. Tested using the code present in the bug.
------------- Commit messages: - Fix promptText is not displayed when the value is reset Changes: https://git.openjdk.org/jfx/pull/1989/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1989&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8296653 Stats: 12 lines in 1 file changed: 12 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jfx/pull/1989.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/1989/head:pull/1989 PR: https://git.openjdk.org/jfx/pull/1989
