Filter doesn't work anymore after update to 2.18

by cpunke, Tuesday, August 21, 2018, 20:25 (2627 days ago)

I had a filter in one of my sources.
It filtered all messages with 'Security:' from a RSS-feed, so they didn't appear in selfoss.

The filter is: /^(?!.*(Security:|string2|string3)).*$/

After update to 2.18 the filter doesn't work anymore and the messages are back again.

Can anybody help me with this problem?