MAPCSS :selected pseudoclass doesn't update for child items with selection change

[sinus+j@…]

What steps will reproduce the problem?

1. Add the following rule to a loaded .mapcss file:

way:selected > node { symbol-stroke-color:#ff00ff; }

2. Select a way
3. Observe its nodes NOT turn purple (or STAY purple) each time the selection changes.

What is the expected result?

Nodes of the currently selected way should be purple. Nodes of de-selected ways should no longer be purple.

What happens instead?

Nodes of some previously selected way become purple, or stay purple despite the selection changing.

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

Reloading the CSS is a sure way to apply the purple rule to the currently selected way, but deselecting it may or may not de-purple the nodes.

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2021-03-17 18:58:40 +0100 (Wed, 17 Mar 2021)
Build-Date:2021-03-17 17:59:56
Revision:17580
Relative:URL: ^/trunk

Identification: JOSM/1.5 (17580 pl) Windows 10 64-Bit
OS Build number: Windows 10 Home 2009 (19042)
Memory Usage: 783 MB / 1820 MB (427 MB allocated, but free)
Java version: 1.8.0_271-b09, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Look and Feel: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
Screen: \Display0 1920×1080 (scaling 1,00×1,00)
Maximum Screen Size: 1920×1080
Best cursor sizes: 16×16→32×32, 32×32→32×32
VM arguments: [-Djava.security.manager, -Djava.security.policy=file:%JAVA_HOME%\lib\security\javaws.policy, -DtrustProxy=true, -Djnlpx.home=%JAVA_HOME%\bin, -Djnlpx.origFilenameArg=%UserProfile%\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\56\1ee8cfb8-260cf852, -Djnlpx.remove=false, -Djava.util.Arrays.useLegacyMergeSort=true, -Djnlpx.heapsize=NULL,2048m, -Djnlpx.splashport=59626, -Djnlp.application.href=https://josm.openstreetmap.de/download/josm.jnlp, -Djnlpx.jvm=%JAVA_HOME%\bin\javaw.exe]
Dataset consistency test: No problems found

Plugins:
+ ImproveWay (29)
+ PicLayer (2a9aa7a)
+ ShapeTools (1240)
+ apache-commons (35524)
+ areaselector (368)
+ austriaaddresshelper (1597341117)
+ buildings_tools (35669)
+ contourmerge (v0.1.6)
+ ejml (35458)
+ geotools (35458)
+ gridify (1606242219)
+ indoor_sweepline (35640)
+ jaxb (35543)
+ jts (35458)
+ log4j (35458)
+ merge-overlap (35640)
+ opendata (35640)
+ rasterfilters (35648)
+ reltoolbox (35640)
+ shrinkwrap (v1.0.4)
+ splinex (35718)
+ tageditor (35640)
+ utilsplugin2 (35691)

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/HiDPISupport&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/NewHighwayColors&zip=1
+ C:\DOKUMENTY\elemstyles.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/Modified&zip=1
- <josm.pref>\styles\sit.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/iD&zip=1

[sinus+j@…]

Better repro case:

1. set the rule
2. select a way, see its nodes NOT become purple, while they should
3. move the way, see its nodes BECOME purple, as they should before
4. deselect the way, see its nodes STAY purple, while they should not

[skyper]

Ticket #20656 has been marked as a duplicate of this ticket.