I’m renewing my challenge for weirdest/hardest to find bug with this one
I was trying to drag a tag onto a Numeric Label. I remembered from FactoryPMI that you used to have to click on a tag first before then clicking it again and dragging it onto its target - this seems to have been fixed in Ignition. I accidentally ended up double-clicking it before starting to drag it, causing the tag properties dialog to appear. Being somewhat confused I released the mouse, as it happens above a text box. The name of the tag appeared in the text box and the tag disappeared from the SQLTags Browser.
Even when I pressed cancel and closed the dialog, the tag had gone permanently.