This is false. It is sunnah to raise your hands in Duaa of Qunoot.

I have a couple of questions to ask you. 1) What is the ruling of qunut during the tahajjud prayer? some people say that it not permissible for us to raise our hands and say “Ameen” behind the Imam. Is this true?

Taraweeh, Tahajjud and Qiyam-ul-Layl | July 8, 2016 1:43 am
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Sheikh what is the ruling on reciting a long dua after the dua e qunoot in salatul witr? As some oppose it by saying that there is a ruling of sheikh albani that he said a long dua in witr should not be done. Pls can you throw some light upon this.
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Shaikh I have a question regarding laylatul qadr. Do we have to find the laylatul Qadr in the last 10 nights of Ramadhan? Or only the odd nights? As In islamqa it says it is LIKELY to be found in the odd nights…does that mean it may be the even night as well…