A family of Microsoft relational database management systems designed for ease of use.
Sadly, 18+ months now, and MS can't even reliably reproduce the issue, so an actual fix ... Not sure we'll ever get one.
IMHO, you have 2 choices, switch backends (SQL server Express, Azure, ...), switch technologies altogether. I just finished migrating another client from Access to MySQL/PHP with great results and no more issues.
How Microsoft can expect users to wait around indefinitely?! Microsoft software, Access in particular, has become too unstable to now rely on. Very sad state to be in.