Power Chart keeps alternating between drawing the trend and showing "No Trend Data Source available. Please add Tags from the Tag Browser panel." The pen stays configured and checked. Happens in both Designer preview and browser sessions. Environment: Ignition 8.3.4 (b2026030309), Windows …

I would guess that the history queries are running slower than the realtime poll rate. Slow that way down for troubleshooting.

I'm also having this issue, and I noticed a large number of 403 errors corresponding to data fetch requests (XHR). It is seemingly always exact 2 successes before another failure. Immediately after, a typeerror occurs and prints to console, presumably because the value wasn't returned.

If you're looking for a better performing Power Chart, I recommend giving this a watch: [Ignition’s 8.3 New Historian API Explained (and how to use it)]

This fixed it for me: [image] [Bug-6340]Power Chart Flashing on Perspective Edge Ignition I have a Power Chart view on my device running Perspective Edge that shows image 1 then quickly flashes image 2 for a split second then goes back to the first image for a …

Power Chart flickers / shows "No Trend Data Source"

Ignition

mmyzer August 5, 2026, 1:05pm 5

This fixed it for me:

Spaces in the project name seemingly cause it