Context menu for imagery layer interupts view movement

[Geimas5]

What steps will reproduce the problem?

1. Add the Norway Ortophoto
2. Right-click with hold and try to move the view

What is the expected result?

The view-port is moved in response to mouse-movement.

What happens instead?

Occasionally, the context menu for the imagery layer is shown instead of moving the view. This happens 1 out of maybe 12 such moves.

The context-menu is also sometimes shown after having moved the view.

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

I have attached a video showing the behavior.

I do not know if it is related, but I have the problem on both Windows and Linux machines. Both running 3x 4k monitors. The specific setup I am using in the video is Windows with using 150% scaling set using the Windows provided Display dialog.

The context-menu is shown even though I am still holding down the right button on my mouse.

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2019-09-29 23:59:43 +0200 (Sun, 29 Sep 2019)
Build-Date:2019-09-29 22:01:37
Revision:15390
Relative:URL: ^/trunk

Identification: JOSM/1.5 (15390 en) Windows 10 64-Bit
OS Build number: Windows 10 Pro 1809 (17763)
Memory Usage: 1653 MB / 1820 MB (842 MB allocated, but free)
Java version: 1.8.0_221-b11, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: \Display0 3840x2160, \Display1 3840x2160, \Display2 3840x2160
Maximum Screen Size: 3840x2160
Dataset consistency test: No problems found

Plugins:
+ buildings_tools (35171)
+ conflation (0.6.4)
+ jaxb (35014)
+ jogl (1.2.3)
+ jts (35122)
+ kartverketimport (35)
+ kendzi3d (1.0.205)
+ kendzi3d-resources (0.0.2)
+ log4j (34908)
+ turnrestrictions (34977)
+ utilsplugin2 (35174)

Last errors/warnings:
- W: No configuration settings found.  Using hardcoded default values for all pools.
- E: Failed to locate image 'https://www.miljodirektoratet.no/Framework/favicon-32.png'
- E: Failed to locate image 'https://www.miljodirektoratet.no/Framework/favicon-32.png'
- E: Failed to locate image 'https://www.miljodirektoratet.no/Framework/favicon-32.png'
- E: Failed to locate image 'https://www.miljodirektoratet.no/Framework/favicon-32.png'
- E: Failed to locate image 'https://www.miljodirektoratet.no/Framework/favicon-32.png'
- E: Failed to locate image 'https://www.miljodirektoratet.no/Framework/favicon-32.png'
- E: Failed to locate image 'https://www.miljodirektoratet.no/Framework/favicon-32.png'
- E: Failed to locate image 'https://www.miljodirektoratet.no/Framework/favicon-32.png'

[Geimas5]

A video of the behavior:
​https://youtu.be/NYzP4l85H_E

[Klumbumbus]

This can happen when your mouse gets old and the buttons don't work properly anymore. Could you please test with another mouse?