I created a blank disk with a size of 1023 GiB then took a snapshot of it with the intention of making new disks from the snapshot.
When trying to make a new disk out of the snapshot and set it to the same size, I got this error

To work around the weird error above, I made it smaller and got the following error (not a bug - it's a valid error):

Afterwards, I was able to put it back to 1023 GiB and the UI gladly accepted the value and created the disk for me:
