Sure ! I don't know where I could find useful info on my Grove installation, but it shows up as GROVE v0.308 in the window title, and the game is stored and launched from an external SSD. Filesystem is NTFS on the relevant partition.
As for the operating system, I am playing on an Arch Linux machine (kernel 6.1.12-zen1-1-zen), with KDE Plasma as DE and X11 for graphics. I'm not sure either of what info you would want to have here but I'll gladly give more !
Thanks for taking the time to investigate the issue :)
Edit: I tried multiple in-game paths and they all let my inventory empty (I can still collect items afterwards but they seem to be in a different inventory than the one I had before)
Is there is a "debug" mode where more things are logged or where I could get a log file for you ?
I'm going to test the same save files on windows afterwards. Will update this comment or reply when it's done