This is what I see:
And you can see the "on all flows" is ticked.
Here is a bit more of what was happening - and Yes, I know: WAS....
I went to the first tab which already had 3 items on it.
Dragged a new item and I could pick the name of the dashboard to put it on.
(Ok.... (thinking) So I set it to that name. CUT it. and PASTE it on the other tab)
Did that and it worked! Wow! Ok. Weird.
Then as soon as I edited that tab, the red triangle re-appeared.
Deleted the node and started again:
Back to first tab, put dashboard node on the page.
Selected the name as per the other three.
Edited the text.
Flicked to the other/new tab.
(Bare with me - sorry.)
I hadn't set the size. So it looked messy.
I edited the EyeSpyTelemetry entry and set it to 12.
Then tried to edit the sizes of the (now) 4 nodes.
All he!! broke lose.
All items were orphaned. Telemetry suddenly was "empty".
I had to create a group (left as Group1) to get all the nodes happy again.
After doing what you said, it seems to be working - for now.
Sorry if that is not helpful, but it is the best I can put together now in retrospect, as I wasn't doing screen captures at that stage and while all that was happening.