That is delay between unit and voice, when it shows the correct position on the screen.
The device is late with pronunciation, with a delay of a few seconds. I've already seen that, but I have no idea why this is happening.
Maybe it's possible to set it in sys file.
Post your here, under spoiler.
There is also the possibility of disagreements between device (launcher, UI...) and the software.
What package are you using? Also, what maps?
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