Welcome in the forum, imdat!
This problem has been seen very often and sadly cannot be avoided. The reason is that on a breakpoint the CPU is stopped, but the internal hardware continues to run, thus producing interrupts which are remembered. When starting by pressing F10 at first the interrupt gets handled. When finished the handler returns to the place it originally came from. And there is your breakpoint. So the program is halted again at the same point.
Ways out: When at the breakpoint, disable interrupts when single-stepping, before executing a run-command enable them again. There is an icon in the menu for interrupts.
Or
remove Breakpoint and set a new one at the next line you want to stop, then execute a Run-command
Happy Debugging!
Bob
