Hi,
I happen to have found myself in a rather odd issue. I have two custom fields of date type & with same name but different letter casing in the issues on my project. One is 'Due Date' and the other is named as 'due date'. I am entering data in 'Due Date' in the issue view but while filtering issues in 'Filters' I see the same entry reflecting under 'due date' column. Refer the images below.


Moreover, I am not able to see 'Due Date' as one of the available options while configuring columns for the filter.
Any explanation on why am I would be seeing this kind of behaviour?