I have an AKDY F278 tub:
https://www.amazon.com/AKDY-F278-Bathroom-Standing-Acrylic/dp/B00E6C1IMC/
We installed it about 18 months ago. I very seldom use it, but after 3-4 uses, the stopper quit working. It's a push-push stopper: push closed, push open. Well now it doesn't "push closed" any...