Kits are losing compilers

Sometimes when I create a new project all kits lose their compilers i.e. each kit has blank for compiler it uses and I need to set the compiler for each kit again.

It happened few times already, but unfortunately but I don't know how to reproduce it as it doesn't happen every time I create a new project.

I usually have more than one instance of Qt Creator open I am creating Plain C++ projects (in case that's a useful information).