id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
11872	WMS caching prevents using more than one layer from a particular WMS_endpoint	Polarbear-j	wiktorn	"(rev 8761)
When I have different layers under one WMS_endpoint, I can only use one of them in the same session, because of the current caching mechanism. Let's say I have WMS_endpoint ABC where I can access historic maps A, B, and C. Since the cache is hold under the name ABC, it mixes the collected tiles.

Thus if call another layer, the tiles from the previous layer are still shown. Only when I move into a new area, the tiles for the new layer are fetched. 

A minor related issue is, when I have loaded both layer A and B, I only see the name ABC in the layer list, and I have to remember which of them is A or B. 

It does not help to delete one layer in the layer list before opening the other. 
It does not help to clear the cache within the Imagery preferences/Cache content, apparently they are still in memory.
It only helps to close JOSM and start a new session.  

A solution might be to separate the namespace, i.e. adding a suffix to the name shown in the layer list as well creating a separate cache for each suffix, e.g. ABC-A and ABC-B. The suffix would have to be derived from the service capabilities.
"	defect	closed	normal	15.09	Core imagery		fixed