Josm layer numbers are not visible

[jose1711]

What steps will reproduce the problem?

• open JOSM
• create a couple layers
• check the layer dialog

What is the expected result?

• every layer should be prepended with layer number as can be observed here

What happens instead?

left brack ellipsis is displayed instead ([...)

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

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2019-11-12 23:28:15 +0100 (Tue, 12 Nov 2019)
Revision:15521
Build-Date:2019-11-13 02:30:55
URL:https://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (15521 en) Linux Arch Linux
Memory Usage: 502 MB / 1992 MB (284 MB allocated, but free)
Java version: 13.0.1+9, N/A, OpenJDK 64-Bit Server VM
Screen: :0.0 1920x1080, :0.1 1280x1024, :0.2 1440x900
Maximum Screen Size: 1920x1080
Dataset consistency test: No problems found

Plugins:
+ CommandLine (35221)
+ ImportImagePlugin (35125)
+ Mapillary (1.5.20)
+ PicLayer (35104)
+ SimplifyArea (34977)
+ apache-commons (35092)
+ apache-http (34908)
+ buildings_tools (35171)
+ ejml (35122)
+ freemapkapor (57)
+ geotools (35169)
+ jaxb (35014)
+ jna (34908)
+ jts (35122)
+ log4j (34908)
+ mbtiles (v2.5.0)
+ opendata (35179)
+ pdfimport (34977)
+ photo_geotagging (34908)
+ reverter (35226)
+ undelete (34977)
+ utilsplugin2 (35230)

Tagging presets:
+ https://josm.openstreetmap.de/josmfile?page=Presets/Freemap&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Presets/LaneAttributes&zip=1

Map paint styles:
- https://josm.openstreetmap.de/josmfile?page=Styles/Kapor2Parcels&zip=1

Validator rules:
+ https://josm.openstreetmap.de/josmfile?page=Rules/CzechRepublicAddressSystem&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Rules/MissingStreetnumberOrConscriptionnumber&zip=1

Last errors/warnings:
- W: java.io.IOException: stream is closed