Flydo vanishing

You might’ve accidentally made a drowning chamber for them

I've encountered this situation as well and can't figure out what's going on. Tigrin's explanation is plausible, but if so, could we get some notifications to let us know it's happening?

It happened to me too and they were enclosed in a place with no water. I even installed "where is my flydo" mod and it counts 0. Not sure how it happened.

6 hours ago, Tigin said:

You might’ve accidentally made a drowning chamber for them

I checked my resources menu and I don’t have any power bank scraps.

2 hours ago, meekay said:

I've encountered this situation as well and can't figure out what's going on. Tigrin's explanation is plausible, but if so, could we get some notifications to let us know it's happening?

No updates yet, but I have made more flydos. So I comment again if anything happens or they disappear again.

26 minutes ago, portalmaster175 said:

I checked my resources menu and I don’t have any power bank scraps.

No updates yet, but I have made more flydos. So I comment again if anything happens or they disappear again.

I think only empty power banks are left behind (which don't take water damage). Another possible but unlikely explanation is that they melted if you made it out of plastic and you had them go on spicy adventures.

1 hour ago, Tigin said:

I think only empty power banks are left behind (which don't take water damage). Another possible but unlikely explanation is that they melted if you made it out of plastic and you had them go on spicy adventures.

I thought that might have happened and I did make them out of plastic but nowhere in my base is hot enough to melt them and there were no puddles of naphtha 

One other anecdote is that on my current run I have the Critter Inventory mod installed, and not only did my one Flydo disappear, but the entry for Flydos disappeared from the inventory -- i.e. the game "undiscovered" Flydos. But I don't know if that's a reliable clue.

This has also happened to me! I had about 20 Flydos and 18 of them disappeared, I cannot figure out what happened to them. There are no accessible hot areas that would melt them and I do not see any naphtha anywhere.