High revs-low acceleration

Hi everyone,

I’m looking for some advice, I drive a 2024 plate VW polo with about 14k miles on it, I was driving in stop start traffic yesterday otw to work and when at one point when I set off again the car was revving a lot but not accelerating as normal and this was accompanied with a burning smell.

After about 3 minutes, when the car had stopped and started again it was fine and I drove it back from work last night and it was all good.

The car was only serviced 2 months ago and they said all was fine and this is the first time this has happened.

What is this likely to be? I have booked in an inspection with VW, but that is not until next Friday so I’m wondering if it would be wise to drive the car or leave it until they’ve had a look.

Thanks in advance !