Sure thing, and thanks again for the excellent font!
For some additional context: The problem is that the glyph can't be input individually given that it is mapped to a combining character. And, when combined with another character, it is placed above it like thisͯ or this̽. See the "Block" and "Combining Class" in https://www.compart.com/en/unicode/U+036F, for example.
Mapping the glyph to any printable character that can be input individually would solve the problem. If I may suggest, the Multiplication Sign (U+00D7) "×" from the Latin-1 Supplement -block could be a good option.
Here's my exact test case: https://codepen.io/bearror/pen/b6f7292ecdbf35cf8bc192cdca4c1649