The solution was also in the “Known issues and solutions” section of the relevant Stable branch update announcement (which, of course, should always be read before doing an update): [Stable Update] 2024-10-01 - Kernels, Plasma 6.1.5, KDE Gear 24.08.1, LibreOffice, Virtualbox 7.1 - Announcements / Stable Updates - Manjaro Linux Forum
It was also the 5th post in that topic: