There are problems with the work of Qt libraries, incorrect work of two programs was noted:
QtCreator completely freezes when trying to build a project, you have to completely restart the program to resume work.
QProcess does not work correctly: the GUI freezes completely in programs using this class, for example, the Cine Encoder program freezes after this line:
On other distributions, in particular Centos 7 & 8, these problems were not noticed.
What could be the way to move forward on this issue?
The issue may not have been seen on CentOS 8 prior as they were older qt5 versions. If you believe this is a bug with qt5 in Enterprise Linux 8 in general, you may want to open a bug report to bugzilla.redhat.com