hw:mem_page_size Works on Flavors, hw_mem_page_size Doesn't Works on Image

Hi, There is a weird situation if it is not a bug. Hugepage instance launching is working if I put hw:mem_page_size on the used flavor. But, when I try the same launching configuration and change hw:mem_page_size on used flavor to hw_mem_page_size on used image, it cannot work as expected. It seems that this issue is like on https://bugzilla.redhat.com/show_bug.cgi?id=1791132, but it still happens on Zed. Is this an old bug? Should I submit a bug report for this? Best regards.