Super slow Wyze Outdoor cam notifications

Not long after I got my cameras the notifications started coming very very slowly to our phones, sometimes a whole minute (I timed it today) after the motion is detected. Most of the time they only catch the very last part of an event (someone walking through the yard, walking down the sidewalk, etc).

For my use, this makes the cameras almost useless. Two of the cameras are right outside of the window where the router is and another is about 20 feet from it so WiFi signal is not the problem. The camera on the back of my house is farther away but it gets good signal and records good so with that one it may not surprise me much that WiFi might be the issue.

What can I do to correct this?