Breakpoint icon disappears after switching kits

1. Create a new Qt Widget Application project and configure it with a MSVC-built and a MinGW-built Qt.
2. Set a breakpoint in main function.
3. Start debugging this with one of the kits.
   Program execution stops at the breakpoint.
4. Stop the program.
5. Make the other toolchain's kit active.
6. Start debugging this with this kit.
   Program execution stops at the breakpoint, indicated by an arrow. The red balloon disappears and is not coming back. In Breakpoints view, the breakpoint is still being listed.

The breakpoint icon should not disappear.