Avenir Next u character is appearing incorrectly

Hi There,

In my indesign file, I'm using the font Avenir Next. The 'U' character is appearing strangely.

I'm using the most up to date version of Adobe Indesign on a Mac computer. The font I'm using is the default version installed on a Mac.

What I've tried:

• Uninstalling and re-installing the font in font book 
• Updating indesign suggested here 
• My view is - View ▸ Display Performance ▸ High Quality Display

Note:

• This is unrelated to zoom size.
• Works as expected in programs outside of Adobe CC.
• According to this thread Adobe Support and Linotype / Monotype are unable to help. 

I've published to a PDF and it seems like this problem doesn't occur on publishing to PDF, which is GREAT news - but it still concerns me. Is it fixable?