custom field type "Enumeration":
for example, there are hundred of list items, (a01, xx | a02, xx | ....| a100, xx | )
the original issue case select a0X, xx,
then add an new items in the list, says a49,xx,
afterward, edit original issue, the item of custom field was changed to a01, xx (not a0X, xx),

i also checked all the submitted issues with related to that custom filed, unfortunately, all have the same problem when click the edit button, the custom fields value is always revert to first item a01, xx