“The button seems to fail regularly when a bit of the internal plastic breaks off & dislodges the return spring so the button doesn’t pop up.
Fortunately they’re not expensive & replacements arrive within a couple of days so no real issue”
“The part works well but the plastic wears and breaks after a few years. This is the second replacement. No fault on the part of the supplier, it's a bog standard economy fitting (pun intended!)”