Invalid SPF Record on spf2.zoho.com

I've just set up a domain on Zoho, and I'm loving it so far!

I'm trying to create SPF records for my domain, and I'm following the instructions on the admin console wiki:
https://adminconsole.wiki.zoho.com/domains/SPF-Record.html

However, I note that spf2.zoho.com includes the following invalid record:

ip4:74.201.84.159/31

I believe this should be:

ip4:74.201.84.158/31

See the following report:

https://dmarcian.com/spf-survey/zoho.com