RP.isRelatedList() returns false when used with List context menu option on UI action - Known Error

RP.isRelatedList() returns false when used with List context menu option on UI action Description Using List V3, a UI action with the RP.isRelatedList() condition and the List context menu option selected returns false. Prior to List V3 this returned true. Steps to Reproduce

Navigate to System Definition > Plugins . Find and open the record for List v3. Activate the List v3 plugin. In the Application Navigator, type sys_properties.list in the Filter navigator text box and press enter or return on your keyboard. Set glide.ui.list_v3.enable to true . Set glide.ui.list_v3.related_list to true . Log out of the instance. Log back into the instance. Navigate to System UI > UI Actions . Click New . name: Test table: Affected CIs [task_ci] condition: gs.log('isRelatedList Output: ' + RP.isRelatedList()) show update: select list context menu: select list banner button: select Click Submit . Navigate to Change > All . Open CHG0000001 . Find the Affected CIs section or tab. Right-click on the entry in the row. Navigate to System Logs > System Log > All . Filter the list: [Created] [on] [Today] and [Message] [contains] [isRelatedList Output] Click Run . Note that the Message column contains isRelatedList Output: false . In the Application Navigator, type sys_properties.list in the Filter navigator text box and press enter or return on your keyboard. Set glide.ui.list_v3.enable to false . Set glide.ui.list_v3.related_list to false. Log out of the instance. Log back into the instance. Navigate to Change > All . Open CHG0000001 . Find the Affected CIs section or tab. Right-click on the entry in the row. Navigate to System Logs > System Log > All . Filter the list: [Created] [on] [Today] and [Message] [contains] [isRelatedList Output] Click Run . Note that the Message column contains isRelatedList Output: true . Workaround There are two available workarounds:

Disable List v3 for the related list, either by using List Control and selecting Disable List v3 or by setting system property glide.ui.list_v3.related_list to false Rewrite the condition to omit usage of RP.isRelatedList() and to look at other factors Related Problem: PRB727989