I don't really know whether this counts as a bug or just a huge lag spike haha (and what would make it report-worthy necessarily), but I keep getting Sessha into situations where their entire inventory is invisible to them and unable to be interacted with. Both of the most recent times have occurred while I was watering gardens with a stack of watering cans, but most recently, I was able to get through nine planters successfully without entering this state, so it may have just been a coincidence.
This time, they are able to scrounge, climb, regenerate resources, find herbs, and move between zones or burrows, provided they can see those burrows. The picked up scrounge/herbs display in the inventory within the same session, and the herbs are also edible (they're an herbivore and I didn't happen to pick up edible scrounge that I recall, so I didn't try...) and provide positive taste messages if applicable, also filling Sessha's stomach. I was also able to drink from a river and receive a temperature notification when I logged on. Closing the game and starting it back up again brings them back to an empty-appearing inventory (though they are growing increasingly encumbered and do take on the effects of being encumbered) and varying ability to see things that aren't on the background layer of the map, so to speak (at its worst, I can't see burrows or placed objects in world; sometimes, I can see burrows and thus enter them, but not see items within the burrow - though as far as I can tell, the burrow map is accurate once I enter. Also, for one session, the burrows appeared again after I wandered away for a bit, so I tried quite a few different sessions in the hopes of getting objects to appear again in the overworld, but it never happened again haha. (They do seem to be logging into the same world as two other characters, with a ping that's pretty close to my recent ping when accessing the game).
The past few times I experienced something like this, Sessha was fine again after a restart or two but it doesn't seem to cease otherwise...I can't tell whether I'm just impatient :P