The swipe left behaviour only seems to work when the swipe is initiated on the left side. If the swipe left movement starts on the right side, then the swipe is not detected.
Swipe left event occurs on an object when you swipe from right to left on that object.
Maybe your initial touch point is outside the object so it doesn’t work.
If it’s not the case, please let me know your browser and device, and send your project to email@example.com so that we can check.