Created attachment 120100 [details] PDF 1.5 Standard Compliant example using RBGroups SUMMARY When using RBGroups (RadioButton groups) of Optional Contents, we can switch from one group to another one in the "layers" panel of okular, but the drawing of the corresponding graphic objects is not updated. STEPS TO REPRODUCE 1. open the attached file "Labels_and_Languages_3_OC.pdf" 2. open the "layers" panel 3. open the "Language" group 4. switch from one language to another OBSERVED RESULT The switching between languages in the user interface is correct (mutually exclusive Optional Contents is implemented via the RadioButton group) but the display is not updated: texts are overwritten on the display. EXPECTED RESULT Each language should lead to different text strings. SOFTWARE/OS VERSIONS Linux distro: Ubuntu-19.04 (and before) Okular version: 1.6.3 PDF Backend: 0.6.5 KDE Framework: 5.56.0 Qt version: 5.12.2 ADDITIONAL INFORMATION The PDF has been generated by my own graphic library Muesli. You can open the attached PDF file with any text editor since it uses only ASCII characters. To my knowledge, it is standard compliant: 'mupdf' doesn't claim about any errors, and the "PDF Tools Online" validator (https://www.pdf-online.com/osa/validate.aspx) returns nothing special about it: Validating file "Labels_and_Languages_3_OC.pdf" for conformance level pdf1.5 The document does conform to the PDF 1.5 standard. Done.
Thanks for the report. It was actually a poppler bug. No need to report it, i already fixed it at https://gitlab.freedesktop.org/poppler/poppler/commit/65adf225eca287f63361cf49bd47388bff81af79