There were 2 bugs on Firefox, related to Firefox not support HTML5 date and time input.
There was a z-index bug stopping certain dates being clicked on the HTML5 date polyfill.
There was a bug with midnight or midday times where each would shift forward 12 hours. This caused a complex bug where the date was correct, but the time was outside the days bounds, so it would then rollover when coming back to edit.
There was a z-index bug stopping certain dates being clicked on the HTML5 date polyfill.
There was a bug with midnight or midday times where each would shift forward 12 hours. This caused a complex bug where the date was correct, but the time was outside the days bounds, so it would then rollover when coming back to edit.