Steps to reproduce:
1. Open the configuration file for one of the defined feeds in $OPENCAST_ETC/feeds. For instance, $OPENCAST_ETC/feeds/series.properties
2. Modify the properties feed.rsstags and feed.atomtags and include tags with non-alphabetical characters, such as "example-tag"
3. Modify a workflow in order to tag published elements with the given tag.
4. Open the URL <your-engage-server>/feeds/rss/2.0/latest?size=10
The mediapackages published with the aforementioned tags are not displayed in the feed
The mediapackages with the tags indicated in feed.rsstags should be included in the corresponding feed.
Workaround (if any):
Use tags with alphanumerical characters only