Unable to limit API access by IP V6

When specifying the following IP range, I receive a validation error on the IPv6 items:

20.43.40.128/25,20.43.41.0/26,20.43.44.208/29,20.111.4.48/29,40.79.132.112/28,40.79.139.80/28,40.79.146.240/28,51.138.215.128/26,2603:1020:805:1::480/121,2603:1020:805:1::500/122,2603:1020:805:1::700/121,2603:1020:805:1::780/122,2603:1020:805:402::330/124,2603:1020:805:802::210/124,2603:1020:805:c02::210/124

To make it easier to read, here they are one line at a time:

20.43.40.128/25,
20.43.41.0/26,
20.43.44.208/29,
20.111.4.48/29,
40.79.132.112/28,
40.79.139.80/28,
40.79.146.240/28,
51.138.215.128/26,
2603:1020:805:1::480/121,
2603:1020:805:1::500/122,
2603:1020:805:1::700/121,
2603:1020:805:1::780/122,
2603:1020:805:402::330/124,
2603:1020:805:802::210/124,
2603:1020:805:c02::210/124

All IPv6 items (lines 9 to 16) fail with the following errors:

Item 9 in the array did not validate: This is not a valid IPv6 address.
Item 10 in the array did not validate: This is not a valid IPv6 address.
Item 11 in the array did not validate: This is not a valid IPv6 address.
Item 12 in the array did not validate: This is not a valid IPv6 address.
Item 13 in the array did not validate: This is not a valid IPv6 address.
Item 14 in the array did not validate: This is not a valid IPv6 address.
Item 15 in the array did not validate: This is not a valid IPv6 address.

What is the acceptable IPv6 format?
Thanks!

Just a quick bump to see if anyone knows the answer to this one?