After avoiding the Microsoft forums, I finally came across this blog and tried the Workaround #2 per Steve Lineberry: Addressed the issue immediately; Thank you for the insight Steve! (and yes, this issue is still a ‘thing’ 6 years later…)

A few notes:
1) I don’t believe this issue is caused by manual workflows; the culprit is the Initiation Form that is generated when a manual workflow starts (this form is optional);
2) I tried granting unique permissions to the ‘wfsvc’ library = Didn’t work;
3) I tried granting unique permissions directly to the ｢WFInitForm.aspx｣ my workflow used = Didn’t work;
4) Although I didn’t try it; Paul Keijzers came up with a solution by moving the Initiation Form to a place/location were users had the rights to access the form: https://sharepoint-specialist.nu/problem-with-workflow-initiation-form-pnp-solution-3ff246cad67;
5) To get the form to populate, my solution was to extend permissions on the site level (per Workaround #2); I found that providing List Permissions {Edit Items; View Items;} and Site Permissions {View Pages; Open;} was enough to get the form to load; users didn’t need the ability to add/delete lists/documents that is attached to ｢Contribute｣. I created a new permissions level just for this issue (https://｢DOMAIN_NAME｣.sharepoint.com/_layouts/15/role.aspx)

– Kenny Lemens; P.E.

I am working on a project and face a very similar problem but the reason why things are not mapping is slightly different based on my scenario. We have a DEV, QA and Prod CTHub and each CTHub has a different WebId so it is not possible to move content types between environments while retaining the document mappings. I am still working with Microsoft to understand the best practice. I suspect the content database for CTHub will need to restored from production to QA and DEV, so that the WebId becomes the same. I will report back once we find a solution.

Hopefully this helps someone else. Your blog helped me dig deeper into understand how all this works under the hood! Thank you!

I am facing the issue in Newsfeed , I have activated Feature required for the newsfeed. however though i am still getting error “SharePoint returned the following error: A required SharePoint feature is not enabled. Internal type name: Microsoft.Office.Server.Microfeed.MicrofeedException. Internal error code: 46. Contact your system administrator for help in resolving this problem.” Eventvwr log details: The Execute method of job definition Microsoft.Office.Server.UserProfiles.LMTRepopulationJob (ID 09695e4b-e5aa-409f-9891-79548e454c67) threw an exception. More information is included below.

Unexpected exception in FeedCacheService.BulkLMTUpdate: Region not found..

My SharePoint server is updated with September CU . I have tried various option including your script to repopulate user feeds.
Other Options are detaching distrubuted services and adding it back.

Our server –> SharePoint + SQL + PHA .

I have been struggling on this for about 2 weeks time. Your help would be saving me. Thanks in advance

Question, do you have MySite host property set in the Collaboration farm UPA? I find that if I don’t have the mysite host property set, the trusted host locations get ignored. This is for extranet scenerio, so I’d like external users to not have any mysite capabilities, but internal users to be able to bounce back to internal farm’s mysite location. Another variable for me is the internal UPA is actually on a publishing farm is that different where the actual mysite host is located internally.

Link to the StackOverflow answer: http://stackoverflow.com/a/17046512/2082340