We know several limitations related to the Fields - Custom Field Types for Jira app related to Atlassian Forge framework.
Integration with Confluence macros, PowerBI, JXL and other third party apps is very limited if not impossible
Issue 1: Using Forge custom fields on a JSM portal or a JSM request type is impossible.
https://ecosystem.atlassian.net/browse/FRGE-778
Release timeline: UNKNOWN
Issue 2: Using the Forge custom field on transition screens is impossible. The fields can be assigned to the screen, but they will be rendered as text fields.
https://ecosystem.atlassian.net/browse/FRGE-322
Release timeline: SHORT TERM BACKLOG
Issue 3: Forge custom fields do not support inline editing on issue view.
https://ecosystem.atlassian.net/browse/FRGE-243
Release timeline: IN PROGRESS
Issue 4: Forge custom fields do not work on Jira Cloud mobile app.
https://ecosystem.atlassian.net/browse/FRGE-538
Release timeline: UNKNOWN
Issue 5: Custom fields are rendered as free text fields on bulk update.
https://ecosystem.atlassian.net/browse/FRGE-648
Release date: UNKNOWN
Issue 6: Forge custom fields do not work in Forms.
https://ecosystem.atlassian.net/browse/FRGE-1243
Release date: UNKNOWN
Issue 7: Calculated and Comment fields (Hardcoded fields) won´t appear on screens where the Default or Field tabs are not selected.
Issue 8: It is not possible to change the custom field type.
Issue 9: The sum (Average) of numeric values in linked issues won't work with read-only fields.
Issue 10: Forge custom fields with graphics(pictures, avatars, etc.) do not work well in issue navigator and boards
https://ecosystem.atlassian.net/browse/FRGE-135
Release timeline: UNKNOWN
Issue 11: Forge custom fields are not supported by Jira automation of the box
https://ecosystem.atlassian.net/browse/FRGE-1108
Release timeline: UNKNOWN
Issue 12: Forge custom fields do not work in JWM list view.
https://ecosystem.atlassian.net/browse/FRGE-1114
Release timeline: UNKNOWN
Issue 13: Using Forge custom fields in other apps doesn’t always work as expected IN PROGRESS
Third party integration such as JXL or PowerBI can pose issues when trying to use Forge custom fields with the app. It is currently in plan to make CFS fields compatible with other apps.