nostr:npub10p7ysxn2hcq2x8f0aqs7unmzaelmq9p4z558caufzr643sa2dqysyfkvwv nostr:npub1hvzjvzfmclu5l5zk65fxye5cgt7e0qvs6rcn60z72v9hy79mmpzq4qmle9 slight changes in font color as well (such as dark grey or navy). 

If you select a paragraph and one of the text options goes blank (font, color, background, size, even occasionally text style), it might be that something was copied/pasted -- it's indicative that some part of the text is different from the default text.