Pdfview disappears after moving the app to background

[BraveEvidence]

I am displaying a pdf after downloading the pdf. The pdf screen has share button in whih i share the pdf url. Suppose the pdf is downloaded and it displays correctly but when i click share button and after choosing an option like whatsapp to share the url and after sharing when i come back to the app the pdf disappears but if i scroll through the screen the onPageChanged is method called but i cant see the pdf.

Following is my code snippet

return PDFView(
                          filePath:
                              patientReportDetailPreviewBloc.fileValue?.path,
                          autoSpacing: true,
                          pageSnap: true,
                          swipeHorizontal: false,
                          nightMode: false,
                          onRender: (_pages) {
                            _totalPages = _pages;
                            pdfReady = true;
                            patientReportDetailPreviewBloc
                                .changeProgress(false);
                          },
                          onViewCreated: (vc) {
                            _pdfViewController = vc;
                          },
                          onPageChanged: (page, total) {
                            debugPrint("Pritish");
                          },
                          onPageError: (page, e) {
                            debugPrint("Error $e");
                          },
                        );

[endigo]

Related to #9