haven't seen anywhere this bug, but you can hold ANY number of objects in hands if you 1) look at item 2) open tab menu 3) press E 4) close tab menu
You can grab a leafblower and a flashlight, spam the left mouse button and get a machine gun with muzzle flash. I can't wait to combine the helicopter stick and the motorcycle and see how fast I can go.
Edit: so I turned myself into this... I had 3-4 trombones, flashlights, 2 leafblowers but sadly only one helicopter stick.