I was hoping that Cubase 9.5 Pro would address this, but alas, 'twas not to be.
When I am finished with a Cubase file and I set the range markers just before the mixdown, the left indicator skips to the right past the zero point. Sure, I can grab the left indicator and slide it back to zero, but why should this even be necessary in a product with so much to offer?
C’mon, guys - this isn’t the first time I’ve brought this up. 
UPDATE: The left range marker moves slightly to the right no matter where you place it - not just at zero. Maybe someone at Steinberg will fix this sucker someday …
Just to chime in to give this issue (not feature request) a bump…
But, I never had or seen the issue you are describing with the locators. I wonder if it is some preference or project setting? Hopefully someone more knowledgeable about this concern will chime in for you. 
Regards 