While plotting a trip in the San Francisco area I was looking into Rivian locations to stop and charge. The Corta Madera in particular would show as a charger then disappear as I zoomed in and out.
I wonder how many other charger locations do the same.
I had a hard time last month on a trip to Florida, my Samsung phone would not show the location in the Tesla app even when I was sitting at the chargers or it would think it was 3+ miles away. Then we tried my wife's iPhone and it worked every time. There were no setting I could change that would make my Samsung find the location. I don't know if this is your issue or not, but I know I will be buying the iPhone 18 this fall.
That sounds like a software bug that should be reported if it turns on/off with zooming.
I will share my own embarrassing experience, thinking I was smarter than the route planner. I kept trying to force it to stop at the Rivian charger at Sac REI because I knew it was there and had used it many times. After manually adding the location to my route planner, I arrived to find they were expanding charging stalls and all stalls were shut down for construction.