Same for me with the Tazer! I haven’t updated mine in years. If it works don’t touch it.
I do use CarPlay so can’t say for sure that it isn’t the issue. But at least I can say it’s definitely nothing to do with the newest iOS because I uncovered the jumping screen problem all the way back in March when I installed a 2025 radio.
This glitch, as far as I know, only exists on a software version that originally went out to 2025s (which offer the 14.5” screen). So I thought maybe it’s something to do with the radio mistaking or forgetting the size of the screen that’s connected. Because when it does it, it cuts off all of the bottom and top buttons…almost like it thinks there’s more screen space than there is. Then the boxes just kinda dance up and down on screen.
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The only way I found to snap it out of this is a cold reboot. Which incidentally gets these radios detect (or re-detect) the screen size via the LVDS connection.