Long Campaign Load Times, Black Screen on PC

Very recently, whenever I play campaign in Halo: The Master Chief Collection on PC, right before the level is about to load I get an abnormally long black screen. Eventually, the black screen will change to the campaign level load screen where you can see the loading bar.

When you die during a campaign level, it also takes a long time to load the checkpoint.

Anyone else experiencing this or know a fix? I have a high-end PC and never encountered these problems before MCC Season 6.