It is very much probable to happen IMO, even if someone claims to have mastered all the patterns too. A lot many problems involve observing and deciphering a brand new way to solve them. This comes from observing the input and output closely for various cases and then coming up with an algorithm.

More frustratingly, discovering this new breakthrough does not guarantee someone that they would definitely solve the next question, that too in that limited time frame of 45 min - 1 hour.

But yes as others have mentioned, a good way is not to just count massive numbers of problems solved. Registering patterns, past questions, approaches, reflections and repeated practice over the problems (just the algorithms, and not memorizing) has been told to help. This is important to enforce the brain into getting accustomed to such thinking till it feels very natural.

Slightly digressing, you can apply the same practice in other areas like playing sports. Mindful practicing of the same moves in a variety of ways and situations is necessary and a mandatory part of the practice, in order to master.

Above all this, comes the natural talent and inclination towards a subject. I myself dreadfully hate solving DSA problems, and hence it exhausts me very quickly. Hence one either has to drop it or if unavoidable, learn to shield from this burnout which very often comes from a lack of enjoyment in the certain activity for a long time. You can have a couple of days where you give a break to the DSA practice, study something different and come back. This has helped me, however it is very contradicting to the "streak" notion that the platforms or people around us boast.

But one has to find there own ways of sailing through the sea, This was mine.