Use of Mapillary plugin causes the JOSM window to shrink

[mapman44]

What steps will reproduce the problem?

1. Activate the Mapillary plugin
2. Restart JOSM
3. Download data

What is the expected result? Normal JOSM window

What happens instead? JOSM window and contents shrink to approximately 1/4 size. Maximizing window does not restore window contents to normal size.

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

I deactivated all other plugins except those needed to run Mapillary.

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2020-04-06 02:17:07 +0200 (Mon, 06 Apr 2020)
Build-Date:2020-04-06 00:18:43
Revision:16239
Relative:URL: ^/trunk

Identification: JOSM/1.5 (16239 en) Windows 10 64-Bit
OS Build number: Windows 10 Enterprise 2004 (19041)
Memory Usage: 254 MB / 989 MB (135 MB allocated, but free)
Java version: 1.8.0_231-b11, Oracle Corporation, Java HotSpot(TM) Client VM
Screen: \Display0 1920x1080
Maximum Screen Size: 1920x1080
Dataset consistency test: No problems found

Plugins:
+ Mapillary (1.5.21)
+ apache-commons (35362)
+ apache-http (35092)
+ javafx-windows (35375)
+ jna (35092)

Tagging presets:
+ https://josm.openstreetmap.de/josmfile?page=Presets/Communication_Towers&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Presets/Mountains&zip=1
+ https://raw.githubusercontent.com/osmlab/name-suggestion-index/master/dist/name-suggestions.presets.xml
+ https://josm.openstreetmap.de/josmfile?page=Presets/OneClick&zip=1
+ https://raw.githubusercontent.com/yopaseopor/traffic_signs_preset_JOSM/master/US.zip
+ https://josm.openstreetmap.de/josmfile?page=Presets/BuildingPreset&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Presets/Power_Mapping_Utility_Simple&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Presets/LaneAttributes&zip=1

Map paint styles:
- https://pasharm.github.io/New_basic_style_for_JOSM/New_basic_style.mapcss
- https://raw.githubusercontent.com/species/josm-preset-traffic_sign_direction/master/direction.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/Coloured_Streets&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/TigerReviewedNo&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Power&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/LessObtrusiveNodes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Styles/iD&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/MapWithAI&zip=1

Validator rules:
- https://josm.openstreetmap.de/josmfile?page=Rules/KeepRight&zip=1
- https://josm.openstreetmap.de/josmfile?page=Rules/MissingWeekdays&zip=1

Last errors/warnings:
- W: java.nio.file.FileSystemException: %UserProfile%\AppData\Local\Temp\josm_exec_powershell_668778796646246068.txt: The process cannot access the file because it is being used by another process.
- W: Unable to request certificate of https://grca.nat.gov.tw
- W: java.nio.file.FileSystemException: %UserProfile%\AppData\Local\Temp\josm_exec_powershell_7570465755143658645.txt: The process cannot access the file because it is being used by another process.
- W: Unable to request certificate of https://grca.nat.gov.tw

[mapman44@…]

Screen capture of JOSM window after activating Mapillary and attempting to download data

[mapman44@…]

screen capture of JOSM window with Mapillary not activated