Fortnite has an issue with seasons coming and going, one that's inherent to seasonal games. There is a solution, though.

Fortnite players notice a significant problem with the OG Season 2 Legendary Zapotron weapon, which seemingly isn't working as intended.

How to Fix Connection Issues in Fortnite Sometimes, there may not be an issue present with Fortnite, and, instead, the problem may be with your connection to the game's servers.

In short, Epic seems to be saying that it knows shader compilation stuttering is a problem in games that use Unreal Engine, but it's actively working on solutions to it all.