Problem with opening Mac File

When I open a .graffle file that has been created on my Mac (OmniGraffle 7.9.2), the text inside of rectangular boxes is not visible and appears to have been drawn at the top of the page.

Is there a setting I need to check to correct this behaviour?

Text offsets from the Mac aren’t supported on iOS currently. Please send us an example of the Mac document and we can advise you which workarounds might help you get the same look without using text offsets. If you’d also like to submit a request that we support text offsets on iOS, please email us at omnigraffle-ios@omnigroup.com.

Thanks,
Lanette