Help with my chain

Hi everyone, I’m reposting this because I had some issues uploading the gif or video from desktop.

Five days ago I received my Canyon Endurace CF6, and yesterday, March 21, I went out for my first ride about 30 km, no crashes, hits, or impacts on any components.

However, I’ve noticed a small issue with the chain and the rear cassette. When I shift to a harder gear (a smaller cog), especially in the middle part of the cassette, the chain seems unsure which cog to grab onto it skips for a moment and then settles on one.

I’m not sure if this is normal (I don’t think so), or if it could simply be a chain tension issue — maybe it’s too loose? The only gear that seems to work perfectly is the largest cog, where everything runs smoothly and quietly.

I’m a beginner, so I just want to be sure I’m not doing something wrong. Could it be that in the situation shown in the video I should switch to the big chainring at the front instead?

P.s I would like to add a video but the subreddit doesn’t allow post with text + video