Anybody else had problems with a strap pin on their FR610 slipping out whilst running?

Had it before in the last 6-9 months but only by a few mm, today on Fairfield was lucky not to loose the watch - the pin had come out nearly a cm without me noticing.

What's your solutions? Thinking something a bit more aesthetic than wrapping some Harry black maskers around it though... Guessing a dab of superglue or similar...

Ta.