Packaging ES3.1 with ASTC .apk file gets -es2 suffix

I am not sure if it’s critical, but when I deploy with ES3.1 and ASTC the resulting .apk gets -es2 suffix, although it goes into _ASTC folder.

Is it just an oversight or does it mean that ES2 renderer is forced ?

There are only -es2 and -esdeferred. ES3.1 is a special case of -es2.