Thanks for the update, John,
If the issue is exclusive to specific features of the Instagram app, we would next suggest using the guidance in If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open - Apple Support to troubleshoot the app itself. While the title of the article doesn't match your issue exactly, the steps included still address a variety of unexpected behaviors an app might exhibit.
If the issue remains unresolved after that, please reach out to Instagram for further assistance: How to contact an app developer - Apple Support .
And if you need additional help once you've done that, you can get in touch with Apple Support directly. You can do that here: Get Support.
Have a wonderful day.