I'm no expert but I don't think you could get that to ever render correctly. That's one of the biggest problems with InDesign, it lets you do things with your layout that will not translate into ePub since it was designed more for print publishing not electronic. Even if you could it wouldn't render the same on all devices/software (let alone convert to Kindle format).
I would create a single image for the whole chapter header and use that instead.
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