I'm using ArcMap 10.5.1 and have been having issues with snapping not engaging for some time. I will have snapping engaged in an edit session and try to use it with the measure or create feature tool, but snapping won't engage. When I move the mouse to try to engage it, it switches to the hourglass for a moment before continuing not to snap.
I've tried modifying the snapping tolerance and the snapping types (edge, vertex, etc.) to no avail. Sometimes zooming in or out will suddenly allow snapping to work, but when I pan/zoom again it won't work. The only solution I've found to this so far is to reduce the number of layers displayed (turning off the basemap layers group, topographic lines, etc.), but I'm working with a map now that I can't get to work even after turning off all unused layers. This map does use two point feature classes with multiple tables joined to them. I assume the main issue is that the snapping function is being overloaded, but I just finished another map using the same layers without snapping issues even without turning off extra basemap layers.
Does anyone else experience this issue, and has anyone identified the cause of the problem or a solution? Thanks.