I am running N8N self hosted version 1.56.2 with MySQL node version 2.4 (Latest) and I am having issues with the MySQL Execute node. When I run the node below, if there is a COMMA passed into the query parameter, the process only updates text before the comma.
Try {{ Array.of( $json.message.content) }} in the query parameters field.
The docs and popups say that it wants a comma separated list, but if I remember correctly it also takes an actual array of parameter data, and that bypasses whatever code is getting tangled up with quotes and commas.