I’m frustrated

V61 Midi keyboard D2 key behaving strangely.

I recently bought V61 and first thing i did was update the firmware and then set the velocity curve to 1. While playing piano on several devices/vsts (iPads, FL Studio, Kontakt) I noticed that whenever I press and hold A2 or B2 right before pressing D2, the key D2 plays the note after a moment with full velocity. This very serious issue. I hope this is just a firmware problem. Please advise.
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