Does Zoho Desk support emails with a plus character in them?

I ask this because we are currently using the Desk Remote Auth feature and receive this error message if we attempt to add a new user with a plus (+) symbol in their email:

GET Request:

https://support.XXX.com/support/RemoteAuth?operation=signup&email=me%2Bdev%company.com&ts=1629831165191&loginname=me&fullname=My+Name&utype=portal&apikey=XXYYZZ&redirect=0

GET Response (200):

{"result":"failure","cause":"IAMError:U131:+ character cannot be in email id"}

I do understand that RemoteAuth is being deprecated in favor of SAML. We are working towards getting that done, but we've had RemoteAuth up and running for a long time and I just now noticed these errors when we attempt to create some users.