A wiki macro with a parameter type defined in an extension is broken as soon as an extension on the same namespace is upgraded or uninstalled

Prerequisites: Have PDF Viewer Macro (Pro) version 2.2.1 installed on the main wiki and get a trial license.

Steps to reproduce:

1. Login with superadmin and edit XWiki.PDFViewerMacro to display, besides the pdf, the type of the file parameter by adding inside Macro code 

   $wikimacro.parameters.file.class.name

   ($wikimacro.parameters.file should invoke a Converter for the file parameter in case it can be found, since this parameter has a Java type defined)

1. View XWiki.PDFViewerMacro and see that the above code is not returning something 
2. Locally update macro-pdfviewer's code to contain a converter from String to PDFResourceReference https://github.com/oanalavinia/macro-pdfviewer/blob/master/api/src/main/java/com/xwiki/pdfviewer/PDFResourceReference.java, which is the  file parameter type (I added the Converter here https://github.com/oanalavinia/macro-pdfviewer/commit/cf0182f15533c789f6751b90df0f283632b60b53 )
3. Build the new version and upgrade the macro to it
4. Go to XWiki.PDFViewerMacro 

Expected result:

The newly added converter is found and the added code will return com.xwiki.pdfviewer.PDFResourceReference.

Actual result:

The result for the added code is still $wikimacro.parameters.file.class.name as if there isn't any converter

At this point I tested the following groovy script and the converter was found (returns com.xwiki.pdfviewer.internal.PDFResourceReferenceConverter@58bb77d8)

{{groovy}}
import org.xwiki.properties.ConverterManager
def converterManager = services.component.getInstance(ConverterManager.class)
println converterManager.getConverter(com.xwiki.pdfviewer.PDFResourceReference.class)
{{/groovy}}

After this I restarted the instance and checked XWiki.PDFViewerMacro, where now the converter is found and I get the following result:

I got the same result with just resaving XWiki.PDFViewerMacro page (with superadmin, since the application is under a license)