text selector does not count the letters i,l,j,f,h,k if they come after an f
Any of the pairs : fi,fl,fk,fj,fh,ff are counted as single characters in animator selector based on index.
Bug appeared after 17.1.4. Layers created in 17.1.4 behave normal in 17.5
Layers created in 17.5 still have the bug if used in 17.1.4.
Here is a photo from AE 17.5.1
All the layers have an animator based on characters by index starting at 3.