For issues you find with the Switch and Console releases, please follow this link and give as much detail as possible. This is the speediest way to get info to Pipeworks and get a hotfix in the works.
For issues you find with the Mobile 1.3 update, please follow this link and give as much detail as possible. This is the speediest way to get info to DR Studios to look at your issue. Also, some troubleshooting hints here.
So you are in luck with two things. First I do have a crimson key and I do happen to have an extra cosmic car key for the UFO. However I am curious if you might maybe have a Plantera trophy on you by chance? I seem to be having trouble getting said trophy. Am willing to trade the crimson key (dont need it cause I used one already) and the cosmic car key for the Plantera Trophy as well as maybe the jungle key (if its the temple key I dont need those cause I get loads of them from fighting Plantera daily for this trophy that seems unobtainable for me) you can add me MikeToTheE on PS4 if youd like as well. Am always looking to help out someone here and there.