API stopped returning email address

The exact same call that I was successfully doing a few weeks ago is failing to return the email address of all members:

https://www.patreon.com/api/oauth2/v2/campaigns/[myCampaignId]/members?include=user,currently_entitled_tiers&fields[member]=email

Everything else seems to be working the same as before, but now each item in the “data” array has “attributes.email” as null, instead of containing the email address.

Has something changed in the API that we haven’t been informed of?