I've noticed that the lists of aged (reposado and añejo) tequila approved for Pessach went from a fairly sizeable number in 5780 down to two in 5781. Someone I know, who is an executive in a nationally-recognised hechsher, only found these two after looking through at least five lists.
Neither of us had any idea what changed lema'aseh, so what factors would explain this drastic a change over the last year in Pessach-approved products ?