Issue Summary

If there are multiple contexts of a custom field and their options were the same, JQL shows those options multiple times by switching from Basic mode to Advanced mode.

Steps to Reproduce

1. Create two projects (any type of projects are okay), "proj1" and "proj2"
2. Create a "Select List (single choice)" custom field named "list1"
3. Create two contexts for "list1" as follows
   context 1:
     project: proj1
     options: opt1, opt2
   context 2:
     project: proj2
     options: opt1, opt2
4. Navigate to "Search for issues" screen, then run the JQL "project = proj1 and list1 in (opt1, opt2) and reporter = currentUser()" in Advanced mode
5. Switch to Basic mode, then delete "Reporter: Current User" condition by clicking the 'x' icon
6. Switch to Advanced mode again. Check the displayed JQL

Expected Results

Displayed JQL is "project = proj1" and list1 in (opt1, opt2)

Actual Results

Displayed JQL was "project = proj1" and list1 in (opt2, opt1, opt2, opt1)

If there were more contexts with the same options, the result was "list1 in (opt2, opt1, opt2, opt1, opt2, opt1, ...)"
If each context had the different options, it worked as expected.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available.