Thank you for providing this additional information. Based on your description I would like to confirm that you are attempting to insert your SD card in the correct orientation. You stated, “It doesn’t seem to go in very solidly”. Please make sure that you are inserting the card as shown in the images below.
I would also be interested to see if another SD card produces the same results. If possible, could you try a different SD card to see if the behavior changes?
If you can confirm you are inserting the SD card correctly and (if possible) another SD card does not improve the behavior then we can certainly send you a new, pretested USBC-7IN1 under your warranty to help resolve this issue. In order to do so, we would need to acquire some additional information. When you have a moment, please contact us directly by emailing us at firstname.lastname@example.org and referencing Ticket # 347794 so we can match things up and discuss the next best steps.
We look forward to your reply.