Constant frame drops

I'm getting these odd frame drops every so often in Battlefront. I've moved the game to my boot SSD to make sure it wasn't the hard drive struggling to access data, I have kept task manager open to eye process CPU time on my second monitor and nothing is interfering with the game - in the middle of a game it'll suddenly drop from it's usual 90-120fps to about 24fps, then suddenly climb back up. It did it just right now in game, except this time it followed up with only a slightly rarer event - it crashed the game. Character suddenly frozen in mid-air, Windows still responding, game closes itself. For the most part the game runs well, but every now and then, a sudden and inexplicable enormous drop in frame rate.

I'm just wondering if there's anything I can change in the settings to stop this from happening, because I've eliminated it being any other program or process taking up CPU time. I'm running on a new-ish system I built late in July of last year -

Ryzen 5 3600

16GB 3600MHz CL18

Radeon RX 5700 XT

Running at 3440*1440. All drivers are updated, Windows is fully updated. Watching task manager while in-game, literally nothing else is suddenly spiking the CPU, it's the game alone that does it. It was happening often on my previous system too, a Core i5 4690K and R9 390X. Running on DX11, I can't remember what happened when I last tried DX12 two years ago but I know it wasn't good, so I really don't want to have to do that.

At this point I'm down to the explanation of, "Well it's coded badly and EA don't care about fixing it since they can't make any more money on it", but again, I'm just hoping there's something in the graphics settings I can change that will at least help with this problem, if not eliminate it.