Long blackscreen upon round start

I’m having problems with my creative map in fortnite (uefn map). Everything is working fine until a new round starts and there are more than ~3-4 players in the game, it takes AGES to load causing people to leave thinking it’s glitched. I’ve been having this problem for more than a month making my map “flop” everytime. I have had times that ~400 players leave within half an hour because of the long loading black screen. With the newest fortnite update it has enhanced a bit, going from “loading next round” to “game starting…” but even with the new update the “game starting…” screen can take up to 2-3 minutes at times.

I have tried modyfing all kinds of settings like word partition/streaming turning it on/off but nothing has helped. This has terribly impacted the engagement of my game.

Map code: 7114-2383-6318

For anyone interested in looking into this problem; here is an example (this one wasn’t that long but it’s like this almost every round)