When using the glide.ui16.emailStreamResponseActions property and UI16 is enabled with live forms, the email reply buttons appear on the Activity filter stream. However, when clicking on these buttons, the email client page displays but when clicking on the message box to type in a message, the pop-up page closes/disappears.
Steps to Reproduce
Make sure the live forms property (glide.ui16.live_forms.enabled) is enabled.
For more information, see the product documentation topic Disable live form feature.
Make sure email sending and receiving is enabled through the glide.ui16.emailStreamResponseActions property.
If you do not see this property in /sys_property_list.do, add it and set it to true.
Go to /incident_list.do and open a record that has an email sent.
Scroll down in the activity formatter and click the Reply/Reply All/Forward buttons.
Note that the email client page appears, but once you click on the message box, it closes.
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Related Problem: PRB1236280