E_FRAME_REQUEST even page contains what's monitored

I monitor a page contain containing system status in a frame, using the Distill Servers (Cloud), and if there is no problems, the page (frame) contains “Der er ingen aktuelle driftsforstyrrelser“. So I set the condition to [Text] [does not contain] “Der er ingen aktuelle driftsforstyrrelser”.

But I keep getting E_FRAME_REQUEST errors. I’ve tried to set up a delay of 2 seconds, but that doesn’t seem to help, even though the [Test] seems to verify correctly.

By the way, I’m not a new user to the community, so why can’t I upload more than one screenshot: “New users can only upload one image”?