The appearance of wild animals in enclosed spaces

[Zilk 1]

Faced the problem of the appearance of creatures in a closed pen.
After going through a bunch of options as if a wild creature got into a closed room for the first time - I did not figure it out !!! 
But when the situation repeated, all the possible options due to the fault of the players disappeared, because everyone who was at the other end of the island. 
And now the question is - Developers how to explain the appearance of a wild creature indoors?

[Stylish 0]

I've had the same problem as well. It may have to do with how much spacing you have between your structures. I was just going to point out this may be more of a bug report if anything the way it's phrased. Unless you want to ask them if they could recode to have spawns check true for sealed snapped airtight buildings before they spawn.

Just be glad an alpha lion didn't spawn and kill your tames aye

[Zilk 1]

STYLISH

The room is 5x5, with an average gate. Closed by a roof all the walls are right except adjacent to the industrial zone. 
There are no holes in the foundations and the foundations of one layer.