We use the light version of Sermon Manager and Sermon Importer. You can test it as follows:
1) create a series with comma in the name: “comma, test”
2) create a new sermon and select the series “comma, test” within the sermon and click OK -> two new series are created “comma” and “test”
As a workaround I used the lower single quote symbol (‚) instead of the comma, that did the trick, but I think there should be a way to configure another delimiter for series, or turn the delimiter off. We, for instance, do not have sermons with multiple series.
and one more thing…
once a sermon post has been updated via REST API the field ‘sermon_date’ loses its value.
As a workaround I query the value of the ‘sermon_date’ first and use it in the update payload to set it at the update.