I agree with you. The pics of seams previously posted showed a straight seam. What you present is an irregular crack. At some point in time you should get that replaced.
Are you in the USA?
DaVinci will make this right. Don't fret. There is a layer of glass there that minimizes exposure to ceramic particles, (as if there are any ). Chat with CS on the DaVinci Vaporizers website during hours. Wait s few minutes to see if the are picking up. If not, they will respond with a ticket number on your email later. Them PM
@Davinci_vaporizer here explaining your crack. Give him your ticket number and maybe he can expedite your RMA number generation. Use USPS "two day if it fits it ships " box. Reply to the RMA email with the Tracking number. Place RMA number on the shipping label, on the box, and on a note inside the box with your info. Clean the IQ and return with original battery installed. Keep your gear. If they replace the IQ, they will send a complete retail package. It will be nice to have extra gear. I don't know if my info is relevant if you are outside the US.
Be patient, be kind to yourself. DaVinci is ramping up CS. I do think they are an ethical company and most times I have seen resolutions of problems.
These pocket wonders are tech miracles by the last decade's standards. The IQ represents cutting edge stuff. I enjoy and benefit from the IQ even if there are growing pains with new engineering designs. I will have a working IQ for ten years and that makes me smile. But I look forward to the next model DaVinci puts out, I'll buy it too.