[2019] Can we talk about the new lag in Salty Shores?

I have two beefy computers, one a gaming desktop and one a gaming laptop that should have absolutely no issues in this game. They run 200+ fps on all maps, and before the latest brightness adjustment for Salty Shores never had an issue. Now, both computers drop below 144fps in certain occasions when the camera faces the corners of these maps, both Salty Shores day and night are affected. The problem started around the beginning of the Summer update, where they added nighttime Salty Shores and adjusted the daytime brightness again. Has this ever been addressed? What data do the devs need?

Edit: System specs
Desktop: i5 3570k @ 4.5ghz OC, Gigabyte RX 580 8GB, 8GB DDR3 RAM
Laptop: Overpowered 15+: i5 8750H, 16GB DDR4 RAM, GTX 1060 6GB (full, not max-q)

Edit 2: video evidence