The German National Security Service named Bystron in his report about the monitoring of AfD as a party with anti-constitutional goals.

On 28 March 2024, Czech website Deník N [cs] and German newspaper Der Spiegel reported that Czech Security Information Service suspects that Bystron was also one of the recipients of funds from the pro-Russian Internet network "Voice of Europe" financed by the oligarch Viktor Medvedchuk.

[5][6][7] In April 2024 the Munich Public Prosecutor's Office initiated preliminary investigations because of possible bribery of elected officials.

[8] According to Die Zeit, Public Prosecuter Office suspected that 20,000 euros were handed over at a meeting between Bystron and employees of Russian propaganda in Prague.

[9] On 3 April, AfD leaders Alice Weidel and Tino Chrupalla demanded a written explanation from Bystron for the allegations made against him.