SUMMARY When one chooses the Digitally sign... option from the tools menu and draws a box but then cancels the signing and switched the tool to anything else e.g. underline the signature option remains active no matter what one chooses. STEPS TO REPRODUCE 1. Open a pdf file 2. Choose Digitally sign...from tools menu and draw a box 3. Cancel signing 4. Try to use another annotation tool SOFTWARE/OS VERSIONS Linux/KDE Plasma: Fedora 35 with 21.08.0 (available in About System) KDE Plasma Version: 5.23.2 KDE Frameworks Version: 5.87.0 Qt Version: 5.15.2
Sorry, the 21.08.0 is the poppler version, below. Okular is as states 21.08.2
https://invent.kde.org/graphics/okular/-/merge_requests/470