Problem with MSLS and Custom Post Type Links?

Hi,

I´m using Custom Post Types: Cat1, Cat2 and a CategoryLink between Cat1 and Cat2 for quering Links between. – This works fine.
Also I use MSLS for linking pages in my MS – this works fine too.
For switching I use the the_msls() in my Header menu.

Now I´ve encountered a strange behaviour:

– Create Cat1 Post in DE
– Create Cat1 Post in EN and link via MSLS -> OK
– Create Cat2 Post in DE
– Create Cat2 Post in EN and link via MSLS -> OK
– Create CategoryLink between Cat1 and Cat2 in DE
– Create CategoryLink between Cat1 and Cat2 in EN
– MSLS Link is ok from DE to EN in Cat1 and Cat2
– but in Cat2 from EN to DE its broken and points to my CategoryLink – Cat1 is OK
– Setting the Link via MSLS in EN results in working MSLS links in EN, but in DE it points to the CategoryLink

Is this a bug or a problem by me / in my setup? Workaround?

https://wordpress.org/plugins/multisite-language-switcher/