Plugin update fails

[skyper]

What steps will reproduce the problem?

1. Have several plugins with older version installed
2. In Plugin Preferences click on "Update plugins"
3. Get a message about plugins' updates
4. Close message window and preferences
5. Restart JOSM
6. Look at plugin version in Plugin Preferences.

What is the expected result?

All installed plugins are up to date

What happens instead?

Plugins with still lower local version installed

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

Plugin update policy is set to always start without asking after update. Sadly, I did not recognize the last updates with this setting but, maybe, it helps to smaller the time range the regression was introduced.
Last plugin update seems to be 35330 but "ejml" failed before 35313.

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2020-03-27 15:39:19 +0100 (Fri, 27 Mar 2020)
Revision:16205
Build-Date:2020-03-28 02:30:56
URL:https://josm.openstreetmap.de/svn/trunk

Plugins:
+ ImproveWay (29)
+ OpeningHoursEditor (35250)
+ apache-commons (35092)
+ comfort0 (35314)
+ conflation (0.6.4)
+ ejml (35122)
+ geotools (35169)
+ imagery_offset_db (35248)
+ jaxb (35092)
+ jts (35122)
+ opendata (35330)
+ reverter (35313)
+ undelete (35313)
+ utilsplugin2 (35248)
+ waydownloader (35092)