Error! Warning! on optical type mounted disks [bug]

I have noticed that for many versions of webmin when the operating system mounts a optical disk or virtual optical disk the webmin dashboard displays “Error! Warning! The *** filesystem mounted at /***/ has no free disk space!” Which is a error because there is not supposed to be free space on said disk. So the error message is a error/bug. It seems there could be a better way to code the error checking in webmin to not display this error at wrong times. I am sure the error checking functions good with ssd/hhd normal disks, but in the case where the disk is not supposed to have empty space the error message does not function well.