Unfortunately, in my experience there are several shortcomings of the field (or at least typical bachelor's master's programs outside teachers's preparation, which is separate in Germany).
They love to talk about interdisciplinarity, and will even call out neuroscience and psychology often. In practice, it's mostly a social sciences field, and as such has been taken over by constructivism. Now, while learning is obviously (IMO) a constructive activity, they will "explain" everything with "handwave... social construction... handwave", while dismissing e.g. neuroscience aspects as "not a learning theory" and thus not worthy of discussion.
The statistical sophistication is very, very low. It's not all linear regression, but mostly, and even when it isn't there is no (even implicit) discussion of causality, just adding all variables (what McElreath calls "causal salad).