When does the plugin reset ranks? Does this happen on map wipe? Does it need to be manually cleared? Is it possible to add the ability to set the plugin to reset this data at wipe or would that need to happen elsewhere?

Thanks!

Just wipe the playtime tracker data file,
Its not something i would contemplate as all my permissions.kits, rewards, player groups (ranks) are based on players spending time on the server, I have twice in the past lost a lot of players when due to glitches the ranks etc have been wiped ,

Wiping the playtime tracker data file clears everyone's time but doesn't remove players from the group after a wipe.