With file https://bugs.documentfoundation.org/attachment.cgi?id=151324, exporting as PDF and Universal accessibility option enable, after a about 15", shows a message: 159546 accessibility issues detected. Do you want to continue? [Continue] export is successful in about 50". [Investigate issues] LO seems doing something but never ends, I drop out it after more than three hours.
Strangely, I got no warnings. It did take like 45 minutes to finish the export. Version: 7.6.0.0.alpha1+ (X86_64) / LibreOffice Community Build ID: 22950a9b008e1bb22fa9e54b5d45715e25fee764 CPU threads: 2; OS: Windows 10.0 Build 22621; UI render: default; VCL: win Locale: en-US (en_FI); UI: en-US Calc: threaded
*** Bug 156625 has been marked as a duplicate of this bug. ***