Ruckler in Fortnite when Streamlabs is open?

Yesterday I tried to stream something again. However, there was then in Fortnite so Ruckler, which were not really bad, but have extremely disturbed. I wanted to ask if anyone knows why this could be.

I thank you in advance

~ T

Your PC probably has too little power.

Assume that your PC has too little power. Fortnite can also be due to a bad ping, ie a bad internet.