As indicated in documentation (https://confluence.atlassian.com/questions/integrate-questions-with-your-spaces-407724495.html), "if you specify multiple topics only questions matching all topics will appear in the macro." This was implemented by CQ-692 in version 1.0.408. This used to be the case, but now it only applies if using the "popular" filter. If you use "recent" or "unanswered", all questions with any of the topics appear. This is a problem for us because most of our questions list macros are set to "recent" filter and with 2+ topics.

This issue was identified by users in CQ-800.