1. In the quiz answer, for example in the question type "Shortanswer" or "Essay", write a less than sign ('<') somewhere in the text and at least one following character - except the space - and submit the quiz attempt .

2. In the quiz report in response  mode, click the Download button and download, for example, a CSV file. In the answer column, all characters starting from the position of the less-than sign (“<”) are cut off.

To me it seems possible that the PARAM_NOTAGS filter type may not be implemented correctly. Beacause a less than sign ('<') somewhere in the text and at least one following character is not a full tag.