fs.lua does not work properly on recent kernels

[cyberpunkrocker-zero]

Using Arch Linux, awesome-4.3-2, lain-git-1767.1db09ba-1, linux-zen-5.13.13.zen1-1

Fs.lua used to work fine, but during the last 1-2 months I've noticed some issues with its selection of what to show in the widget popup.

For example, I have 2 storage drives, sda and sdb, in addition to the nvme disk for the os. Both storage drives have one partition filling entire disk, both are mounted via /etc/fstab, both are fully accessible by the os... but currently, the fs widget popup shows only sda1, never the sdb1. Also, /dev/shm is sometimes shown, and sometimes it seems to appear and disappear on its own, like, whenever I mount an usb drive, /dev/shm sometimes appears at the same time.

I suppose this has something to do with some changes in recent kernels?