The dashboard has a few issues when gdb connects to the qemu gdb stub.
One of which is the parsing function for breakpoints, which can't handle hardware breakpoints.

Num Type Disp Enb Address What
1 hw breakpoint keep y 0x010055d0 in main() at main.cc:24

Traceback (most recent call last):
 File "<string>", line 550, in render
 File "<string>", line 2293, in lines
KeyError: 2

Why did you decide to parse the output instead of using gdb.breakpoints()?
The provided issue (https://sourceware.org/bugzilla/show_bug.cgi?id=18385) has been fixed since 13.1.