New comment by superiums on void-packages repository

https://github.com/void-linux/void-packages/issues/40589#issuecomment-1321549194

Comment:
> Why are you mounting things under `/dev/shm`? That's ill advised.

aha, got it ! this is the reason which caused the issue.
i've tried to mount lv to /media/xxx, and it never loose now.

i mount it to /dev/shm/xxx for temp use, usuallay i use /dev/shm as temp directory.
before use void linux, in arch, there's no problem in this way. 
but seems in voidLinux it works in different way from other os .

i'm now interesting with why mount to /dev/shm/xxx will cause data loose.