Recently KDE started to maintain a collection of patches for Qt 5. This is because Qt 5 came to end of life with Qt 6 now released (KDE Frameworks has started the slow process of moving to Qt 6). With many Qt 5 users out there the Qt Company are selling a maintained verson of Qt 5 but for the community KDE has started a collection of patches to fix the bugs. In KDE neon we like to build everything in KDE directly from KDE so we have now moved to building Qt too. This means our Qt now calls itself 5.15.3. We also updated PyQt to 5.14. Let us know if you find any problems.