@Nick L. For what it's worth: On my `MacBook Pro (15-inch, 2018)` (touch bar), I get the pop up when I plug in my charger. (I'm guessing some relation to indexing that doesn't happens in a battery-save mode?)
This is fairly reproducible on my machine.
```
Version 7.10 (457750 Direct)
Editor: 69.1.8237 (1f0aea9)
```