Own design feels awesome, dull over time

I was working on a mobile app design, at the beginning when designing app it looks awesome, but over time it became dull without changing anything significant (same colors, same fonts, same dimensions), but others designs look awesome. But after I came back from a long break it look awesome again(same design). Why is that?

I get the same feeling if I use a nicely designed app or website continuously, I think this may be also a reason why companies change their designs annually or so, so users do not get bored by the design and feels some novelty annually. Am I correct here?

My guess is our brain get adapted (create memories) to the design when working with the design continuously and novelty fades away. Then when we take a long break and come back, the previous memories of the design had faded away, so the same design looks awesome.

Is there any technical name for this phenomena in field of designing?

Is there any tips and tricks that you use to avoid feeling dull by your own design when working continously?