History for ways doesn't show tag changes

[midgard]

What steps will reproduce the problem?

1. Select a way that had tag changes, e.g. ​https://osm.org/way/158601617.
2. Optionally, change tags on it.
3. Press Ctrl+H to view history.
4. Select a diff (by clicking the changeset's line, by clicking the radio buttons or by using the keyboard).

What is the expected result?

You should see the correct diff between old tag revisions.

What happens instead?

All uploaded versions are treated as if they had the same tags of the most recent uploaded version.

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

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2019-04-28 04:36:41 +0200 (Sun, 28 Apr 2019)
Build-Date:2019-04-28 02:37:58
Revision:15031
Relative:URL: ^/trunk

Identification: JOSM/1.5 (15031 en_GB) Linux Arch Linux
Memory Usage: 620 MB / 1749 MB (272 MB allocated, but free)
Java version: 1.8.0_212-b01, Oracle Corporation, OpenJDK 64-Bit Server VM
Screen: :0.0 1920x1080
Maximum Screen Size: 1920x1080
VM arguments: [-Djosm.restart=true, -Dawt.useSystemAAFontSettings=on]
Dataset consistency test: No problems found

Last errors/warnings:
- W: No configuration settings found.  Using hardcoded default values for all pools.
- W: Region [TMS_BLOCK_v2] Resetting cache

[midgard]

Faulty history viewer (for correct revisions, see ​https://osm.org/way/158601617/history)

[midgard]

The problem only occurs for ways, not for nodes or relations.

[GerdP]

It seems that the data delivered by the api is incorrect:
​https://www.openstreetmap.org/api/0.6/way/158601617/history

[rickmastfan67]

Yes, it seems it's an issue with the API, as I did some testing all the way back to r13879 (released May 31st, 2018), and was getting the incorrect tag history. Pretty sure somebody before now would have noticed this issue if it was a pure JOSM issue. My guess is either the OSM API is having a brain fart, or it was updated (haven't been keeping track). That's about all I can add on this issue.

[GerdP]

See ​https://github.com/openstreetmap/operations/issues/293#issuecomment-495971438

[GerdP]

The problem was in the api and was fixed now.

[Don-vip]

Link for reference: ​https://github.com/zerebubuth/openstreetmap-cgimap/issues/181