Cached tiles don't respect zoom levels on project reload

[tomchadwin]

1. Add a VTR source (I used Zoomstack)
2. Zoom close in to get some detail to load
3. Zoom back out
4. Save project and close
5. Reopen project

Result for me is ?often/?always that the details from the zoomed-in tile are rendered onto the canvas even though my initial view is at a zoom level where those features should not be rendered.

[mnboos]

Thanks for the ticket.