Syntax highlighting issue with raw strings into macros

 The following code:

#define COMPORT_NAME R"(\\.\COM1)"
#elif defined(Q_OS_LINUX)
#define COMPORT_NAME "/dev/ttyS0"
#else
#error "OS is not yet supported"
#endif

gives wrong syntax highlighting until some point, where it is became recovered to the correct state.

The context and a portion of the following text incorrectly highlighted are attached.