Commercial release announcement: https://www.qt.io/blog/commercial-lts-qt-5.15.5-released
OpenSource release announcement: https://lists.qt-project.org/pipermail/development/2022-June/042659.html
I want to personally extend my gratitude to the Commercial users of Qt for beta testing Qt 5.15.5 for the rest of us.
Commercial Qt 5.15.5 release introduced some bugs that have later been
fixed. Thanks to that, our Patchset Collection has been able to
incorporate the reverts for those bugs     and the Free Software users will never be affected by those!