AI and Goals: "Attack (In sight, Near) entity of type [##]" problem

The content of ## from the title keeps getting randomized everytime I tried to open the workspace even when saved.

Like for example, I set it to: 
"Attack (In sight, Near) entity of type [Player]" then save it and tried ingame, after a while when I wanted to change something, I went back the workspace and open it again, there's a high chance that the "Attack (In sight, Near) entity of type [Player]" will be changed to something like "Attack (In sight, Near) entity of type [CUSTOMMOBhere.etc.etc]". Also when I tried to click it, half of the list is undefined.