For gameplay issues, please ask other users first on our Discord which you can join here: https://discord.com/invite/pcbuildingsim.
If you play on PC and see a technical issue, please submit a support ticket with your save file along with a description of the issue and a list of any parts involved.
If you play on Console, please submit a support ticket with a description and screenshot of the issue along with a list of any parts involved.
If your issue is a collision between two parts, see this page: PC Part Collision