FYI I just received a response from Suzuki France about the "QS" issue, here is the Google translation :
"Following the checks and interventions carried out by the technical team of the Suzuki dealership in Maromme as well as our Regional Manager, we have been assured that your vehicle meets the quality and reliability standards established by Suzuki.
Indeed, this sensation of cut is a security in the electronic control management of the gear lever. If the shift action is not sharp enough, the ECM will increase the power reduction delay to ensure proper upshift locking. The aim is to avoid the risk of damaging the gearbox and thus guarantee the reliability of our products."