Latency on Calls while taking incoming calls

Hi folks, I am having an issue while I receive inbound calls on jitsi. A calls comes in and picked up by Auto Answer Jitsi, I can’t hear customer and they can’t hear me either. A call shows as bounced calls. Is it just because of Low RAM in PC or Internet. Internet is 150mbps corporate line and its works fast but having issues only while taking calls on jitsi. Whereas, I have other internet on 6mbps which works perfectly fine and jitsi can connect calls. Please guide me. Thanks