Hi Daniel! This looks like an unexpected behaviour 🤔

Would be great to have access to your file to see if we can replicate it. If you can, feel free to share it here, or by filling out this form directly to our support team so we can investigate further: https://help.figma.com/hc/en-us/requests/new. Thank you!

We had the same problem with exporting icons. To fix it, I turned the “Ignore overlapping layers” from the options menu next to the format name (shown in the image). You may test it and check if it fixes the problem for you too.