I have broken 2 of those straps in the last 12months. It seems to be caused by sand getting into the strap then grinding and wearing evertime you make adjustments.
A thicker strap may be required - but please cabrinha do not change this setup style

Rinsing out after a session may help but it is not easy to get the embedded sand out of the fibres or the strap. I now try to avoid ever putting my bar down in the sand