Yep. I actually have both problems in different areas. Some too fast, most too slow.I have the opposite problem. There's a strict 25 MPH limit in my neighborhood, so I like to use TACC around my house. The maps think the streets are 55 MPH. Every time I start TACC, the car launches to almost 40MPH by the time I can scroll down to the actual speed limit.
Someone posted this. Don't bother--it doesn't work.
To follow up, I actually submitted an incorrect speed limit via voice control bug report. Not sure if its a coincidence or Tesla actually fixed it, but its correct now!
They definitely make corrections in my experience as above.
How exactly did you submit the bug report by voice? I know you can say "report bug" (or something) but the last time I tried it didn't have a way to give any more information.