Does anyone ever have problems with constrained Locators, say to a line or to a circle, momentarily losing their constraint? I seem to have a fair amount of trouble with this. Sometimes the Locator will be pulled off the line but then snap back. Sometimes I can pull it off and let go and it will stay off, but snap back the next time I click it. Often the problem comes and goes with time having periods when it behaves properly and periods when it gets loose. On a line it always has problems only on one end of the line.