Probably too many assets and special effects they had to add in, resulting in your device crashing. I'm not an expert, but something that could potentially help at least a little is clearing your PC/Destiny 2 cached data (not your data files) or restarting/unplugging the device for a decent amount of time, then reopening the app possibly? Hope this helps a little. like I said, I'm not an expert at this or a certified moderator but I'm a console player and restarting my device always helps with the lag and stuff, and it SHOULD work for PC too.