The problem is it opens fine in D5 and D6 broke it. You could rebuild those suffixes, but as it’s obviously a bug, I would maybe just use D5 for now and see if an update fixes it. There have been several chord symbol bugs with D6 reported already, and with both D4 and D5 there was an x.0.1 update within a month of the release, so there might be a fix on the way. Or maybe not and all older projects will now have to have chord symbols edited. 
If it’s possible to just continue the project in D5, I would probably do that for now. If you have to move ahead in D6, I’m not sure there’s an easy solution other than redefining that b9 with the correct spacing.
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