Full-screen inactive pop-ups on latest Mac OS, latest JOSM beta-release

[stevenjo1@…]

What steps will reproduce the problem?

1. Using JOSM in full-screen mode
2. Clicking a feature
3. Clicking History in the Selection box of the Dialogues panel

What is the expected result?

A small pop-up window with actions

What happens instead?

A full-screen version of the pop-up, not tiled to the right of the screen although there are two window-headings at the top, which is inactive and sometimes cannot be removed without force-quitting JOSM.

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

I reported the same issue yesterday with the split-ways reuse-history pop-up, using JOSM 17084 and latest Mac OS 11.0.1 Big Sur. You speedily replied - thank you - and suggested I tried again with the latest beta-release. The issue doesn't occur when JOSM isn't set to full-screen.

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2020-10-03 13:42:38 +0200 (Sat, 03 Oct 2020)
Build-Date:2020-10-04 01:30:47
Revision:17084
Relative:URL: ^/trunk

Identification: JOSM/1.5 (17084 en_GB) Mac OS X 10.16
OS Build number: macOS 11.0.1 (20B29)
Memory Usage: 841 MB / 1820 MB (695 MB allocated, but free)
Java version: 1.8.0_261-b12, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Look and Feel: com.apple.laf.AquaLookAndFeel
Screen: Display 69985664 2048x1152 (scaling 1.0x1.0)
Maximum Screen Size: 2048x1152
Best cursor sizes: 16x16 -> 16x16, 32x32 -> 32x32
VM arguments: [-Djava.library.path=/private/var/folders/jh/yycsgk7s03x86hgcdpw15bxw0000gn/T/AppTranslocation/C8B0F8A4-A0F5-4D63-AAB5-5E900C6EBF38/d/JOSM.app/Contents/MacOS, -DLibraryDirectory=${HOME}/Library, -DDocumentsDirectory=${HOME}/Documents, -DApplicationSupportDirectory=${HOME}/Library/Application Support, -DCachesDirectory=${HOME}/Library/Caches, -DApplicationDirectory=${HOME}/Applications, -DAutosavedInformationDirectory=${HOME}/Library/Autosave Information, -DDesktopDirectory=${HOME}/Desktop, -DDownloadsDirectory=${HOME}/Downloads, -DMoviesDirectory=${HOME}/Movies, -DMusicDirectory=${HOME}/Music, -DPicturesDirectory=${HOME}/Pictures, -DSharedPublicDirectory=${HOME}/Public, -DSystemLibraryDirectory=/Library, -DSystemApplicationSupportDirectory=/Library/Application Support, -DSystemCachesDirectory=/Library/Caches, -DSystemApplicationDirectory=/Applications, -DSystemUserDirectory=/Users, -DUserHome=${HOME}, -DSandboxEnabled=true, -DLaunchModifierFlags=0, -DLaunchModifierFlagCapsLock=false, -DLaunchModifierFlagShift=false, -DLaunchModifierFlagControl=false, -DLaunchModifierFlagOption=false, -DLaunchModifierFlagCommand=false, -DLaunchModifierFlagNumericPad=false, -DLaunchModifierFlagHelp=false, -DLaunchModifierFlagFunction=false, -Dapple.laf.useScreenMenuBar=true, -Dcom.apple.macos.use-file-dialog-packages=true, -Dcom.apple.macos.useScreenMenuBar=true, -Dcom.apple.mrj.application.apple.menu.about.name=JOSM, -Dcom.apple.smallTabs=true]

Plugins:
+ buildings_tools (35640)
+ markseen (14)
+ measurement (35640)
+ scripting (30798)
+ terracer (35640)
+ utilsplugin2 (35640)

Map paint styles:
- https://github.com/MissingMaps/josm_styles/archive/master.zip
- ${HOME}/Desktop/JOSM me, baby./applepaintstyles-main.zip

[Don-vip]

Closed as duplicate of #20112.