Focus 4,2019, 1L ECOBOOST / NOISY TRANSMISION

[iulian_cc]

Hello, I'm new to the forum and I'm facing a rather strange issue with my Focus, and I'm thinking maybe you've encountered this situation, which goes like this:

There's a noise/knock in the gearbox (transmission area) at idle after revving the car to 3-4K  rpm. The noise disappears when I press the clutch pedal or drive a few hundred meters, and it also disappears when I try to put it in any gear without pressing the clutch.

The noise doesn't exist at first start-up, as I mentioned above; it only appears after high revving.

Have you encountered something like this? Thank you for your responses.

[unofix]