Theme check AppBlockValidTags not working

[Octipuss]

I recently have implemented Theme Checker on the local environment. 

From my understanding, "AppBlockValidTags" check should only fire on the Theme App extension Blocks. 

My current website does not have an App block extension and it appears that "AppBlockValidTags" is fired for any section or .liquid file in the environment. 

For example, in the image below, you can see that the check is triggerd on the theme.liquid file.

Unless i am getting the specifications wrong, i believe this to be an error. 

Does anyone have this issue when using Theme checker?