`keep-inventory` / `keep-exp` flag does not working in global region

As the title goes, create one region with command, like `/rg define theArea -w world -g`

And set the flag to `yes`, but players still got items lost if he died in this world.

I've tested that normal regions defined through worldedit selection tool could trigger the function correctly.

Using: 1.21.4 Purpur build latest，WorldGuard Extra Flags 4.2.4 with WorldGuard 7.0.13.