Non-project administrator role cannot see milestone comments or history pages - appears blank

Non-project administrator role cannot see milestone comments or history pages - appears blank

Hello,
Trying to use Project module to manage lessor projects and have found that non-project administrators cannot see history pages and comments made for milestones.  Even assigned role as project admins who are not project administrator to module can see them.  
Any suggestions or known issue here to be addressed?

Thanks,
john

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