You could try to put the firewall into Learning Mode and see if it corrects the issue.
From the Wordfence Dashboard click on Manage WAF. Then you will see Basic Firewall Options > Web Application Firewall Status. Change the option to Learning Mode. Now perform the actions that were causing issues. This will help Wordfence learn that these actions are normal and it will allow them in the future. After you have finished performing the actions, switch the WAF from Learning Mode back to Enabled and Protecting. Now test to see if these actions work correctly.
https://www.wordfence.com/help/firewall/learning-mode/ is an amazing resource for learning more about the WAF and learning mode.
Sometimes with API’s, they have IPs you can whitelist for the service to work flawlessly. I am having trouble locating any IPs for the Instagram API. Learning should resolve your issue though if you want to reinstall Wordfence and test.
Let me know what you find!
Thanks!