Good news is that it is clearly font related rather than board or master config (assuming you are implying that after you get to another font all is well.)
A few standard things to ask/check. Where did you get the new font (ie if from saberfont, kyberohonics or other proven source, and optimized for CFX, I would expect it to work fine.
Next, check to make sure that every expected and required sound file is in your new directory. Use the manual and also check against fonts from the default, or others that work.
Last, check the sound files are in the correct format (also in the manual.)