In Texmaker, when I mistype a word, say "liok" and I choose a suggested word, like "look", it adds this symbol "&" at the beginning or in the middle of the word.
First, I thought, that the dictionary wasn't good. I changed the dictionary, but the problem remained.
Any suggestions? Please take a look at the gif.
EDIT: I realized, that the &-symbol gets added, where the underline in the selection is. Maybe this information helps you: