Debug pane missing

This Monday, when I started QtCreator (4.6.2) with my CMake project, the debug pane was missing in the debug view (see attached file qtcreator_bug.png). I somehow managed to get back the dialogs that show the stack trace as well as the break points. However, the debug buttons (which used to be above these dialogs) where still missing. Today, when I started up QtCreator, these dialogs are again missing (along with the debug buttons).

I am using an Antergos Linux. The output of qtdiag is attached in file qtcreator_bug_qtdiag.txt. Messages that are printed out when I start QtCreator with GDB are attached in file qtcreator_bug_gdb.txt.

Follow up: Sooner or later this happened to me on any QtCreator version that I used at least since QtCreator 4.6.2.