relation editor: sorting and directions with forward/backward not working properly.

[skyper]

What steps will reproduce the problem?

1. open a 2-way route relation with some members with role forward/backward
2. select all members and sort them

What is the expected result?

I get a well sorted relation with full connection and direction indication

What happens instead?

• Sort does not always work, especially, if there are more than one way to sort it and only one way is accepted
• Perfectly sorted members are rearranged (see above) and connectivity is rendered wrong (not connected)
• the direction of oneway is interpreted wrong

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

• I made a small example file​.
• moving some members down/up helps sometimes.
• reversing simple relations like in the example should also be correct but JOSM does not like them.

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2019-07-07 14:17:28 +0200 (Sun, 07 Jul 2019)
Build-Date:2019-07-07 12:18:47
Revision:15221
Relative:URL: ^/trunk

Last errors/warnings:
- W: java.io.IOException: Attribution is not loaded yet
- W: Bing: attribution data is not yet loaded.
- W: java.io.IOException: Attribution is not loaded yet
- W: Bing: attribution data is not yet loaded.
- W: java.io.IOException: Attribution is not loaded yet
- W: Bing: attribution data is not yet loaded.
- W: java.io.IOException: Attribution is not loaded yet
- W: Bing: attribution data is not yet loaded.
- W: java.io.IOException: Attribution is not loaded yet
- W: Bing: attribution data is not yet loaded.

[skyper]

example file