Inconsistent ping?

🐢Latency Issue🖥️Desktop Issue

I recently got fiber optic at my house, which greatly increased my internet speed and consistency. But, whenever I queue Val on my home servers, my ping is either 15 or 45, nothing in between. I'm not exactly complaining, since I know I'm still better off than a lot of people, but I really would like to know why this is happening. It feels very random.
Playing on wifi set to 5ghz only.