If you have the time/means. Try making a double D-ring setup and putting the strap back onto itself.... (Like if you know in rock climbing you have the buckle you put the strap through and tie it back onto itself, it's called "doubling back" the strap or something like that....)
That's the best thing I can think of, I haven't used a chicom rig so I don't really know any solutions other than applying one from something I do know (rock climbing).
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