LingQing phrase with number at the end

I have noticed that I cannot LingQ a phrase if a number is at the end of the string of words that I want to LingQ. For example, I might want to LingQ the phrase ‘das Jahr 1960’, but when I select the entire thing, all I get is ‘das Jahr’. I can LingQ a phrase when the number is in the middle, or at the beginning.

Is this a normal thing, or maybe a problem with my current browser?