RF 100-400 possible problem

Curious if anyone else has noticed this beside me and I haven't seen it discussed on here. I'm using an RF100-400 on my EOS R and it seems after a short time the lens seems to be putting off a hot plastic odor for lack of a better way of putting it. Has anyone else noticed this happening with their lens? I'm wondering if I'm going to run into a problem with it? It's not very old and I haven't used it much. It would of course be just my luck........:rolleyes: