Problem with Duik Angela Rigging - Arm Shrinks When Linking Arm Bone to Body

I was following the tutorials on rigging a human body, and after I rigged the arms, I'm supposed to link the Arm bone to the body. But when I do that, the whole rigged arm shrinks down and sort of twists up. I have attached 3 images to show what happened. Has anyone else faced this issue or know how to fix it? I tried scaling the rigged arm back up but it had twisted the rig and deformed some parts.

Could it possibly be that I have some setting switched on somewhere that is automatically doing this? I'd appreciate any help!

PS: I wasn't able to find anyone else who had this exact issue online, but there was one similar doubt that didn't seem to get answered on the Adobe Community page, I've linked it here: https://community.adobe.com/t5/after-effects-discussions/rigging-using-duik-2-in-after-effects/m-p/12940290