Lag

I’ve been lagging out consistently the past three days almost every other game. My wifi hasn’t changed in speed and I’m the only user. I have a 250 mb download and 9 mb upload speed. This has never happened to me before so consistently. I’ve restarted my phone and closed the app several times. Is this happening to anyone else or should I look more into my wifi? I also turned off my cellular data so the app doesn’t read it as a switch in connection