GDBGUI on Windows provide paths with backslashes that doesn't supported by GDB

Hello,

Environment:
GDB: 7.11.1
Windows 10x64
Program was built using ubunty subsystem under Windows 10 with debug information

GDBGUI sends http request that includes the following
105:42/gdb_listener,["run_gdb_command",{"cmd":["-break-insert \"C:\\mnt\\c\\Project\\filename.cpp:523\""]}]
when I want to add breakpoint

and GDB removes backslashes (function mi_parse_escape in \\gdb\mi\mi-parse.c), so create_breakpoint function work with location
C:mntcProjectfilename.cpp:523
and get "file not found" error