Sluggish to accelerate randomly but turning car off and on resets it

I know there are a lot of issues with this car, and the CVT transmission. I had the same problem last year with sluggish acceleration. I had codes for oil pressure sensor and something with solenoid. Code wound up disappearing and mechanic couldn’t replicate issue. Had it serviced with oil change (it was my daughter's car and way overdue) and the problem seemed to disappear. It’s back. The only code that can be pulled from scan is for the airflow actuator and that makes sense because there’s a piece that’s broken inside for it. But I feel like this is separate from that. It really is random that it’s sluggish. I’m using the car to Uber. The RPMs will go high to round between three and four. No higher than that and then immediately drop after it finally accelerates. It’s going in the shop this next week but I’m trying to get an idea what to have them look for first so that I don’t wind up with the necessary repairs that I really cannot afford.