As already pointed out, はやぐち is no longer accepted as a reading for 早口. We decided to remove it because 早口 is only read as はやぐち when it’s a proper noun, and we wanted to avoid people thinking that the vocab could be read this way. I know it’s a pain for people who have already learned the はやぐち reading and I’m sorry 
Rest assured that we don’t do this often — only when we feel it’s really worth it!
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