I often feel like learning things with Anki puts memories into the wrong part of the brain. It happens way too often that I can perfectly recall something from Anki (on a PC or phone), but have a lot of trouble recalling it 'in action'.
I also experience this phenomenon. In learning a language, I like to think of Anki as the primer stage in learning a word. I have to encounter and recognize that word in the wild for the memory to be fully solidified. I'll often go back to my Anki card and add a note of where I encountered it IRL, and that usually makes that card stick for good.
From my podcast on SRS I linked in another comment:
> [00:11:27] These SRS flash card apps are very good for learning vocabulary and depending on what's included in the flashcards, they could be for grammar as well. But the problem for a language learner is that it's de-contextualized. So say if you just study vocabulary words, then they're going to be a lot of things that you'll miss like collocations. You won't know which words are normal to use with which other words. For example, in English, if someone asks, "How are you?" it would be completely normal to answer, "pretty good". It would also be fairly normal to answer, "absolutely fantastic". But it would be strange to answer that you're doing "absolutely good". There's no grammatical reason. It's just not something that English speakers tend to say.
> [00:12:17] And there are many, many, many language features that are like this. There are also questions of word boundaries. For example, in English, the word "nose" refers to a person's nose or a dog's nose, but not every kind of animal. For example, an elephant in English doesn't have a nose. It has a trunk. In Japanese, the same word, 鼻 (hana), is for a person's nose and the elephant's nose. So the question is, what exactly does "nose" mean? Well, really tedious language teacher could explain this for every single word that you study, or even put this on the back of every flash card for every word that you're reviewing. But, it's not going to be efficient. You'll spend so much time worrying about edge cases for every single word that you're learning that you're actually not going to get anywhere.
Extensive reading avoids all of these problems. It feels slower than cramming words at the beginning, but over time, it's a much faster way to build a functional vocabulary.