I wanted to add my experience because it sounds very similar to another review here describing the bottom metal strip and plastic connectors failing after a couple of years.
The same thing happened with my door. The two small plastic arms on the bottom link broke, which allows the metal strip at the bottom of the flap to slide out of position. When it shifts, the flap can jam and prevent the door from opening properly.
Recently I came home from work and found my dog stuck outside because the bottom piece had shifted due to the broken arms and the flap would not open from the outside. We live in Yuma, Arizona where temperatures can get extremely high, so that situation was very concerning.
Aside from this issue, the door itself has worked well and the rest of the unit is still in good condition. It just seems unfortunate that such a small part failure requires replacing the entire flap assembly.
I’m hopeful the company might consider making the small replacement parts available, such as the bottom link connectors or repair pieces, rather than requiring customers to purchase the full flap. I’ve also reached out to their support team and hope we can find a solution.