Debugging DEMO bare_metal_blinky on da14695

I use a da14695 USB DevKit and for testing I built the demo bare_metal_blinky from the da1469x family website. Building and flashing works, the LED blinks. And I'm on a Linux system.

BUT: if I now try to debug it, whether with SmartSnippets or manually, with GDB-Server cli commands:

-if swd -device DA14695 -endian little -speed 8000 -port 2331 -swoport 2332 -telnetport 2333 -vd -ir -localhostonly 1 -singlerun -nogui

and then connect to the server, I seem to get an exception. On cli debugger it's like this:

arm-none-eabi-gdb bare_metal_blinky.elf
... ...
(gdb) target remote :2331
Remote debugging using :2331
0 x00000000 __isr_vector ()
(gdb) c

继续。

Program received signal SIGTRAP, Trace/breakpoint trap.
0xfeffffee in ?? ()

SmartSnippets takes me to hw_watchdog.c and the functionhw_watchdog_handle_int(unsigned long *exception_args)

I guess this is some kind of exception, since I had no breakpoints set, but what am I supposed to do here? What am I missing?