One of my applications (Sailfin) is freezing due a deadlock within Qt caused by QTBUG-76157. This has been fixed with a patch in several Qt versions above 5.12.5. I’ve modified and applied this patch to the Jolla branch of Qt myself. This solves the freezing for my application and somehow I managed to do apply this patch to a core system component without soft bricking my phone
Anyhow, are there any chances that such bug fixes from the upstream Qt repository could be backported to the Jolla branch? I’ve heard rumours about it not being possible due to licensing issues with the newer Qt versions and the fact that OpenSSL 1.1 on the Jolla branch has been implemented in a different way than in the upstream Qt versions supports this rumour.
A Qt upgrade to a Qt version that fixes this and other bugs, such as 5.12.5, would be even better, but I’ve seen people asking about it since I started using Sailfish OS. I expect the answer to that request to be the same as the answer given to all the people who’ve requested it before me.