General   (General discussion, talk about anything.)

When first playing Für Elise, one's counting tends to lose accuracy because of the considerable variation in cognitive demand: i.e. beginners tend to play it unevenly.

You will find whole websites just dedicated to playing the piece evenly.

ABRSM piano examination syllabus rates the whole work as grade 5, and the well known portion as early grade 3.

AT this point, a learner will have had plenty of exposure to all the common time signatures.

I have never heard of anyone experiencing difficulty moving from common time, but I guess if you are not receiving any tutoring, or pursuing recognised learning pathways, if depending on nothing more than your own familiarity with tunes, perhaps it is something you experience.