I am by no means an expert on this. Just have one of those Linear XXXX opener devices too that is goofy on occasion. I’ve concluded 2 things.
You can’t rely on your phone as a presence device to open or close your garage door. Also, that device is really persnickety. Sometimes it stops working for a couple of days (have to do the unplug/plug back in routine) or it just stops working for just 5 minutes. When my wife opens the garage entry door during a specified time frame in the morning, the garage door is suppose to open. If the garage door doesn’t open as it should, she has to actually press the opener button manually! Sometime when she has to do that, the garage door opens 5 to 10 minutes later on its own. Luckily I’m home an my Sonos tells me it’s opening.