The bundle is missing 6 slots of space (see the attached image; it totals to 58 rather than 64 but shows as full).
Please have this fixed soon. The bundle is already considered bad thanks to it only really being useful before beating the ender dragon, and this doesn't help its case at all.
Thank you for your report!
We are tracking this issue in MC-203960, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as Works As Intended, which means this is not considered a bug and will not be fixed. Please do not leave a comment on the linked ticket.
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