Illusioner using wrong subtitles when shooting

Description
Skeletons use the correct sound subtitles, like the image to the left.
But then illusioners use the same sound and subtitles! (the image to the right)
How to Reproduce
1. /summon illusioner
2. /gamemode 0
3. Look at the subtitles (provided that the "Allow Subtitles" option is turned on).