Huge Audio lag when watching playback

Hello,

I have a problem, when I am watching the playback on my timeline, the audio and video end up desynchronizing, sometimes greatly (up to 2 seconds). I have a good PC : i7-9700k, GTX 1660 TI, 32 GB RAM. It is very annoying while Editing, is there somthing I could do to avoid this problem?

thank you