update

Author: tapanm-MSFT

powerapps-docs/maker/portals/known-issues.md

@@ -6,7 +6,7 @@ manager: kvivek
 ms.service: powerapps
 ms.topic: conceptual
 ms.custom: 
-ms.date: 01/17/2020
+ms.date: 05/07/2020
 ms.author: tapanm
 ms.reviewer:
 ---
@@ -16,6 +16,8 @@ ms.reviewer:
 
 ## General issues
 
+- Rich-text for notes in timeline isn't supported by Power Apps portals. Ensure you [disable rich-text editor for notes in timeline](https://docs.microsoft.com/en-us/powerapps/maker/model-driven-apps/set-up-timeline-control#enable-or-disable-rich-text-editor-for-notes-in-timeline) when using on portals.
+
 - Due to ongoing compatibility issues between the updated Yahoo YDN OAuth provider endpoint and Power Apps portals, users are temporarily unable to authenticate with [Yahoo identity provider](./configure/configure-oauth2-settings.md#yahoo-ydn-app-settings).
 
 - The **Modified Date** for the app might be incorrect because these are pre-provisioned apps and could have been provisioned earlier.