Flex Circuits - Bend proximity spec

Is there a specification in relation to the proximity to features that a Flex circuit should or should not be bent? I am experiencing broken tracks on some flexible circuits which appear to be getting 'flexed' directly adjacent to a soldered joint in the circuit as part of our end customers test procedure. Which in turns means that when we receive these circuits back, in order for us to inspect for this broken track, we too are also having to bend the circuit at this point. Possibly further inducing the issue. I would expect that there should be a minimum clearance between this type of feature and any flexing of the circuit. Would appreciate any input.

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