When selecting points in a web app through a mobile web browser using an iOS device, the ellipses in the pop-up window appears below the visible screen and cannot be selected.
When accessing the full screen pop-up on the mobile device, hold the screen to view the ellipses. Touch the ellipses with a different finger. The screen is fixed in this orientation, allowing the user to click the button.
Turn the device to the landscape view. Scroll down to the bottom of the pop-up window and turn the device back to the portrait view. The ellipses remain visible.