When used with a pipe such as translate (ng2-translate) the label is not correctly updated.
First display - OK
After language switch - KO
I'm using the ultima-ng theme but I don't thik the problem is related to the theme.
I have the similar issue, and it seems that it's related to #1685
This simple change closes #1685 and #1719. I don't know what was the point of this change, but it was okay before commit b976a9d.