Textbox font color incorrect in IE, but correct in PDF export and SSDT preview

When I run a report within SSDT, the font color on a textbox works properly, showing up in red as the value is well above the target in blue text:


However, when I deploy the report and run it in IE11, the font is incorrectly black:


The real kicker is if I export the IE11 output to PDF, it shows up in the expected color (red).
I know I'm looking at the correct report on both ends because if I set the font color to something static like "Purple", it is the same in both SSDT and IE11.

Perhaps one other consideration: there is a drilldown (action) on this textbox.

Any thoughts how to resolve this?
According to the Help/About window, this is using SQL Server Data Tools 14.0.61712.050 and SSRS 14.0.1016.232. IE is 11.0.9600.19356.

Thanks,
Jeff