How do I insert a strikethrough iota into a FrameMaker 2015 equation?

Report · Feb 12, 2018

In FM 2015, I can no longer insert a strikethrough iota into an equation.

I have a defined special character, but when I insert it the strikethrough kills the previous part of the equation.
Previously, I could go into Start/stop string and do this. But now the strikethrough in the tool bar is greyed out, and selecting it in character designer does nothing. Furthermore, if I start the string, select "i" and change the font to symbol to get an iota, the insert string will not end, and the quotes are displayed in the equation!
This used to work in my older FrameMaker