In order to find out what's causing the problem, the headliner must be dropped (removed) to access the sunroof motor so it can be inspected and removed to inspect the slide cables up inside the sunroof/moonroof assy. Until that's done, there's not much more I can do to help except speculate.
I agree if it's anything like a regular window mechanism and it's getting stuck completely and making noises when doing ti likey cable is old or torn and finally got jammed. Don't keep pushing the button your just gonna make it worse. It's not gonna magically get better . I had to replace the entire window cable assembly ot was frayed or a year made funny noise when open and closing it I ignored it and of course regretted it two years later when It finally got fully jammed ..I could have snipped a wire and maybe mad don't work but I ignored it and kept using it making the issue worse. You have to look at the mechanism to underground it. Luckily only had to take my entire door off to replace it. Headliner sounds like fun ! Lol
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If this occured after trying to close the shade while the moonroof was opening, it is possible that the plastic tab that locks into the vent (and subsequently the rest of the moonroof) has been bent. I was having a similar problem where my vent would only go up on one side and stay closed on the other (and it would sometimes get stuck open). It would also prevent the rest of the moonroof from opening up. If this is the case, from what I can tell, there is no easy fix for this. Upon researching this problem, you are the only other person asking about it and zero fixes. For the time being, the vent can be closed by lifting up on one side to "unlock" the stuck tab and you should be able to put it down. After that, you should look up instructions to remove your moonroof glass to see if you can inspect the affected area to determine the cause. Here is a link that shows you how to remove the moonroof glass, but does not address the exact issue you describe.
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