Photoshop :: Why Does CC Randomly Fill Leading And Tracking After Entering A Value

I've been running into a bug where entering a value into the leading and/or tracking fields in the Character panel generates random numbers. The major problem has come when I'm building banners at large sizes. I enter a value and suddenly I get a min/max warning that I've clearly gone over the maximum value allowed by Photoshop in that field. I press "OK" and another random value is inserted into the field rather than the allowable maximum value, which the warning box promised me it would enter in the field. This generally continues until I force quit Photoshop CC and restart it...hopefully not loosing too much work in the process.
 
(I've been burned too many times by Photoshop bugs and issues to know that I should save very frequently...to my desktop.)