Phantom Feature

[AmeliaNewsam]

I think I'm losing my mind.  I suddenly noticed a feature that could not be selected in a feature class (I've been working on this feature class for a very long time, never seen it before, don't know how it got there).  I turned all layers off, and it's still there!  It's not a graphic, it's boundary scales with scale.  Any ideas what's going on?  (ArcGIS Pro)

Follow-up:  I saved, closed, and reopened the mxd - all is well, feature is gone.  But still, weird!

[DanPatterson_Retired]

if it can't be selected, try removing one layer one at a time to see if it disappears.

If it doesn't disappear when you have removed all the layers.  Delete the map and open a new one and add the layers to it one at a time

[AmeliaNewsam]

Thanks Dan, I'll try that if it happens again. 

[JoeBorgione]

I lost my mind some time ago.  Turns out it was no great loss....