updateNumber is changing the font color from black to white

[jackthese]

I have created a table of numbers that display properly with a dark black font initially. However, when I use updateNumber to change a value, the value of the number changes correctly, but it's font color changes to white. This does not happen if I use the up/down arrows in the number box itself, or if I simply edit the number directly. But when I trigger the number change by pushing a separate button I've made for the purpose, the behavior occurs.

Is there any way to directly set the colors of the font or the "field" color within the number box that the font sets on?

I have other tables on other projects that do not display this behavior.