Pop-up UI does not load until mouse hover on Manjaro Linux

[Enderbyte09]

What steps will reproduce the problem?

1. Install JOSM development on Manjaro Linux KDE Edition
2. Do something that opens a pop-up (like trying to delete a member of a relation)
3. Buttons do not load until you hover with mouse.

What is the expected result?

Buttons would load immediatly

What happens instead?

Nothing loads in the message box until the mouse hovers

Please provide any additional information below. Attach a screenshot if possible.

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2023-01-26 23:46:32 +0100 (Thu, 26 Jan 2023)
Build-Date:2023-01-27 02:30:58
Revision:18645
Relative:URL: ^/trunk

Identification: JOSM/1.5 (18645 en) Linux Manjaro Linux
Memory Usage: 1416 MB / 3522 MB (989 MB allocated, but free)
Java version: 1.8.0_362-b09, Oracle Corporation, OpenJDK 64-Bit Server VM
Look and Feel: javax.swing.plaf.metal.MetalLookAndFeel
Screen: :0.0 2560×1440 (scaling 1.00×1.00)
Maximum Screen Size: 2560×1440
Best cursor sizes: 16×16→16×16, 32×32→32×32
Environment variable LANG: en_CA.UTF-8
System property file.encoding: UTF-8
System property sun.jnu.encoding: UTF-8
Locale info: en_CA
Numbers with default locale: 1234567890 -> 1234567890
Desktop environment: KDE
VM arguments: [-Dicedtea-web.bin.name=javaws, -Dicedtea-web.bin.location=/usr/share/icedtea-web/bin/javaws]
Dataset consistency test: No problems found

Plugins:
+ changeset-viewer (0.0.6)
+ changessum (v0.1.1)
+ continuosDownload (105)
+ easypresets (1623509627)
+ measurement (35978)
+ utilsplugin2 (36011)

Tagging presets:
+ <josm.userdata>/EasyPresets.xml

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/iD&zip=1

Last errors/warnings:
- 00001.009 W: Update plugins - You updated your JOSM software. To prevent problems the plugins should be updated as well.  Update plugins now?

[skyper]

Replying to Enderbyte09:

Java version: 1.8.0_362-b09, Oracle Corporation, OpenJDK 64-Bit Server VM
Desktop environment: KDE

I remember problems with KDE and older java versions. Could you try if updating to java 17+ (openjdk-17-jre) is solving the problem.

[Enderbyte09]

Thank you so much! That seems to have solved it.