The human brains is full of these biases, phenomena, patterns or whatever else they' might be called
I've noticed this one pattern too.
It's like a calm before the storm.
You enjoy it because you know it won't last too long (you know that this is not really what life is, it's just a short and pleasant break, and the next problem is just around the corner)
Another pattern is feeling like giving up on something, then a few months later you feel like working on it again because
the desire to get it done "pops in" again, but when you gave up on it the first time you thought it was stupid and not worth the effort (or that you weren't capable of getting it done anyway).
Cognitive dissonance maybe? I dunno
Or when you try to solve a problem, and it just doesn't work no matter what you do,
but a week or two later when you try to solve it the solution just pops in your head almost magically/without too much effort
and you're like "how didn't I think of this before?"
Or when you screw up, but then your brain just accepts the loss/pain
and makes you believe that you don't have it too bad, that you should move forward with your life, the "hope and cope mechanism"
"you don't need your right hand to live a happy life, there's so many thing you can do with just one hand. Kids
in africa would love to only have one hand left or something" It's an example, don't worry about my hands
I have an app on my phone where I keep notes of all of these thought patterns that tend to become habits
it can be very useful to know how your subconscious mind works and how to predict it and control it with your intellect