Have you ever had word change before your inner ear? I have and it's scary. It feels like meaning, representation, and pronunciation unhinges thus leaving an awkward gap. Repeated focus only accentuates the disconnect. As if three concepts used to be aligned, but are now off by just a nod.
I wonder if it's because a neural pathway is breaks and the neurons has to travel slightly different, slightly longer way, which offsets the timing that you've grown dependent on. Perhaps pronunciation arrives a hair before meaning and it used to be the other way around.
Feel like trying? Write down a single line. Keep rearranging the words or even substitute a few. Focus intensely. Can you feel it?