If it's just about that, fix those low priority issues and bundle them along with the next higher-priority fix pack, i.e. "lower than low" -> fix but not release immediately; "medium" or higher -> release with any earlier unreleased "lower than low" fixes.
Seeing how much energy you spent in dismissing the person's report on the "lower than low" vuln in https://hackerone.com/reports/3455037, it'd be easier and faster to just fix it rather than argue...