windeployqt fails when an external Qt module is used (QtPdf)

When running windeployqt on an executable using QtPdf module, the windeployqt.exe execution fails with the following error:

Unable to find dependent libraries of C:\Qt\Qt5.12.4\5.12.4\msvc2017_64\bin\Qt5Pdf.dll :Cannot open 'C:/Qt/Qt5.12.4/5.12.4/msvc2017_64/bin/Qt5Pdf.dll': Le fichier sp▒cifi▒ est introuvable.

Since QtPdf is a Qt module but is not embedded in Qt binary directory, windeployqt may warn that a library is missing but continue the analysis for all other dependancies.

I suppose this issue should be reproduced with any Qt module compiled out of the official Qt distribution.