Hey, sorry I didn't get back to you sooner.
I'm both really glad you like the asset and were able to solve the issue, thanks for sharing the solution for anyone who might run into the same issue. I cannot tell you why this happened, I have admittedly only tested the asset in unreal (as that's my engine of choice) and am not sure how it interacts with other engines.
Please don't hesitate to share you project, I'd love to see the font out in the wild