Issue Summary

If you are performing 'Edit issue' action from automation, only first 50 fields will showed up for 'Choose fields to set' option.

Steps to Reproduce

1. Create an automation which has 'Edit issue' action.
2. Make sure your site has numerous custom fields in it. Try creating a field which starts with letter R, S, T, U as they comes last in alphabetical order.
3. Then look for your custom field. The search engine will look for all the fields who has matching string.
4. If your custom field falls under first 50 fields which search engine look for, you would see the field appearing in 'Choose fields to set' option.
5. In case your custom field falls after 50, you won't be able to see the field appearing in 'Choose fields to set' option.
6. I have created custom field S in my test instance and I am not able to see the field appearing in 'Choose fields to set' option.

As shown in below screenshot, only 50 fields will be populated from search result

Expected Results

All the search results should be appearing correctly

Actual Results

Only first 50 custom fields with matching criteria will show up.

Workaround

1. You can rename the field as per alphabetical order.
2. Use the "Additional Fields" section to set the value of the field manually through JSON.