Arduino goes on and off when connected to the Raspberry Pi4?

I connected a Wiegand RFID module to my Arduino, which makes a tone by itself at the start. When I connect my Arduino to my laptop it works normally.
On my Raspberry Pi, however, the sound is interrupted in the middle and starts again. The Arduino must be connected to the Raspberry via USB so that they can communicate via the serial port.
Do you have any idea why this is so and how I could solve it?

My guess is that the Arduino is not getting enough amperage. How many amps does the power supply of your Pi4 deliver?