1. if the solution of a gap contains a less-than character ("<") followed by a word and there is no spaces inbetween, then OO obviosly recognizes the less-than character as the beginning of an html code and adds and closes it automatically (see Figure 2).
This does not happen with other calculation characters, e.g. greater-than sign or if a number is directly after the less-than sign.
Workaround: Enter blanks before and after less-than characters and solution without blanks among the variants.
2. further bug on the topic "angle bracket": If a term with the angle brackets (e.g. ArrayList<House>) is defined as solution in the gap, only the text outside the angle bracket (e.g. ArrayList) remains as solution after the storage process.