If I make an edit to a calendar listing on an event that repeats, it shows the Event Color that was selected in the original post, but when I "Update Event" or "Update Event and Group," the Event Color changes to a default blue color. The same happens whether I change "Only This Event" or "All Events." 

To avoid the color change, no matter what else I change, I have to click on the Event Color, re-choose the same color (even thought it already shows a checkmark on the original color), to keep the color from changing. 

My expectation, since I did not change the color or want to, that it would stay the same as in the original post without any action. Is this a bug?