Reprojection error

[Polarbear-j]

I get the tile-offsets as shown in the attachment when particular imagery layers are reprojected.

How to reproduce:
Set Mercator/EPSG:3857, load Berlin 2011.

Tiles are shifted, retrieved as epsg 4326:

2017-11-20 11:17:56.652 INFO: GET http://fbinter.stadt-berlin.de/fb/wms/senstadt/k_luftbild2011_20?FORMAT=image/png&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS=0&STYLES=&SRS=EPSG:4326&WIDTH=512&HEIGHT=512&BBOX=13.3717263,52.4665849,13.3730996,52.4679582 -> 200

When I switch JOSM to epsg:25833, it retrieves the images again in native projection and displays them fine.

I had tried to clear the cache for this layer, but behaviour remains.

Set Mercator/EPSG:3857, load Berlin 2013, which does not show the problem:
However JOSM retrieves Epsg 25832:

2017-11-20 11:23:21.729 INFO: GET http://fbinter.stadt-berlin.de/fb/wms/senstadt/k_luftbild2013?FORMAT=image/png&TRANSPARENT=TRUE&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS=0&STYLES=&SRS=EPSG:25832&WIDTH=512&HEIGHT=512&BBOX=796920.1153236,5821941.6414557,796996.5523486,5822018.0784807 -> 200

Well, it might be the case that the fault comes from the server when delivering epsg 4326. If that is the case, I'd need a method to nail the imagery layer to be retrieved in their native format (e.g. always 25833)

Identification: JOSM/1.5 (13064 en) Mac OS X 10.11.6
OS Build number: Mac OS X 10.11.6 (15G1611)
Memory Usage: 2284 MB / 3641 MB (1088 MB allocated, but free)
Java version: 1.8.0_131-b11, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: Display 69733312 2048x1280, Display 725111823 1680x1050

[bastiK]

Cannot reproduce the problem. The entry for Berlin 2011 lists EPSG:25833, EPSG:25832 and EPSG:3068 as supported projections, so it should not try to fetch tiles in epsg 4326. (And it does not in my test.)

The question is, how do you load this imagery? Is it a custom entry or taken from the official list?