We create many questions with multiple categories through the WP dashboard, but when a front-end user edits the question only one category is retained because the front-end page for editing the question has a drop-down allowing only a single selection.
Please change the Category drop-down in the front end question editor to a multi-select drop-down field so all categories can be retained when editing.
Yes, at the moment the DW Q&A plugin does not support the multi-select drop-down for categories.
You should select one category in the back-end. I sent and notified to our technical team about this issue. We will check and discuss about it.
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