Jumpy Rpm's under no-load on gearbox

Hi,everyone!

I have noticed when driving in gear (1st and 2nd)  and not applying load on the gas pedal (just cruising in gear) on a straight road the Rpm's jump up and down in hand with a whinning noise, once speed lowers to some extent it goes away. Additional observations is when some sort of kick back or sudden drop after a short pull (you know when you have to manuever in the city and do a quick jump to change lanes)... i have booked a visit to the dealer, but you guys probably will have suggestions by then.

here is a video

https://youtube.com/shorts/3i-xBKPZEek?si=-HGzsr9c-aKSNCWl

Thank in advance

Edited 29 June, 20241 yr by ArtursLV