Set-SPEnterpriseSearchFileFormatState disabling built-in IFilter issue on Sharepoint SE

Any update on this? We're seeing the same behavior in SharePoint Server 2016. It returns the same error whether you're trying to enable/disable a 3rd party iFilter or just trying to disable the built-in PDF parsing filter. For example, the following commands fail:

$ssa = Get-SPEnterpriseSearchServiceApplication -Identity "Name of Search Service Application"

Set-SPEnterpriseSearchFileFormatState -SearchApplication $ssa -Identity PDF -Enable $false -UseIFilter $true

Set-SPEnterpriseSearchFileFormatState -SearchApplication $ssa pdf -Enable $false

It seems SharePoint 2013 had KB2883000 released to address an issue with enabling iFilters. But we're not seeing anything similar mentioned about a 2016 or SE hotfix.

The official MS docs say this should be possible in SharePoint 2016. Perhaps it's a similar issue affecting SharePoint SE:

https://docs.microsoft.com/en-us/sharepoint/troubleshoot/lists-and-libraries/ifilter-alternative-to-the-native-pdf-parser

The reason we're trying to get this to work is we want to enable Adobe's PDF ifilter 11 to see if it will resolve some issues we're having with the SharePoint built-in PDF parser successfully parsing certain types of PDFs. The error we get is:

"This item was partially parsed. ( Error parsing document ssic://50184. Document was partially processed. The parser was not able to parse the entire document")