Regarding OSP PCBA shelf life.This is based on the thread (#73465 PCB SHELF LIFE AFTER FIRST REFLOW | 9 February, 2015)| 6 December, 2017
Suppliers have improved the utility and quality of OSP [organic solderability preservative] solderable surface protection over the years. Be cautious reading too much into older SMTnet [and web in general] conversations about handling OSP.
When properly applied, you should be able to wait a day or two between heat cycles, providing that OSP surface is not damaged. Find out ...
* Was it properly applied? [Your supplier should be happy to help understanding this question.]