CRM 2015 Online & OSX El Capitan & Safari 9.0 & Email Body & Template Editing

Good Day,

We're seeing several users have an issue using CRM 2015 Online (latest build but 2016 is not yet available to us) with Mac OS X El Capitan and Safari 9.0 where users are intermittently unable to click into and edit the body of an e-mail or insert a template.

The Social Pane on various forms also appears to be cut off at the length of the shortest section on the form (or at least can't be extended past 12 lines regardless of "auto expand to use avail space" setting.

Both occur using the new or legacy form rendering engine.

I've not been able to find either of these issues in a known issues list or a bug fix list for CRM 2016.  Has anyone else seen this or have additional insight?

Thank-you!