Captive Portal and Quota Reset

We are using captive portal with Balance 310x. Most users set to 60MB per day with a quota reset each day. This doesn’t seem to be working as expected. Initially thought quota reset would happen at time set in captive portal config (this is only revealed in guest tab when open access is also enabled, which is a bit strange). this is not however how it is working. Seems to be some unusual 24 hour period from what I can tell.

Anyone know a way to get a consistent quota reset at a specific time? Is this possible?