missing label on math panel?

I found that some of the buttons in math panel have no labels. The ones have labels appear randomly scattered. Bugs? Any fix? Thanks. Max

missing label on math panel?

I found that some of the buttons in math panel have no labels. The ones have labels appear randomly scattered. Bugs? Any fix? Thanks. Max

missing label on math panel?

I found that some of the buttons in math panel have no labels. The ones have labels appear randomly scattered. Bugs? Any fix? Thanks. Max