Service Portal: Removing attachment from "Ticket Attachments" doesn't refresh activity under "Ticket Conversations"

When removing an attachment from "Ticket Attachments" in the Service Portal, the activity "Ticket Conversations" is not refreshed.

1. Submit a catalog request in Service Portal
2. Navigate to Ticket Form and attach a file via the clipper icon
3. Remove the attachment in "Attachments"

Expected behavior: The attachment is removed from the activity in "Ticket Conversation"

Actual behavior: The attachment is NOT removed from the activity in "Ticket Conversation" until the page is reloaded

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