3581394 - "SAP GUI for HTML Settings" is not persisted when change it from SAP Build Work Zone, standard edition

• Integrated webgui application into SAP Build Work Zone, standard edition (BWZS) per document Integrating Business Content.
• When modify "SAP GUI for HTML Settings" from BWZS like following images, the change is not persisted. Upon opening application again, the change gets lost. When do the same change via direct URL of ABAP system (bypassing BWZS), no such issue.
  
  
  
   
• When simulate issue and capture network trace via browser developer tool, could notice following kind of requests end with 'Finished' status:
  
  
  
  If choose the request, then will notice the "Request URL" starts with wss/ws like following image:
  
  
  
  From the 'Console' tab of browser developer tool, could see log:
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  webgui_min.js:588 WebSocket has not readyState open, readyState is: 3
  webgui_min.js:590  WebSocket connection to 'wss://<subdomain>-sapdelim-<BTP destination>.launchpad.cfapps.<region>.hana.ondemand.com/sap/bc/apc/sap/webgui_services?window_id=<xx>&session_id=<yy>&pr_session_id=<zz>' failed: 
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"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."

• SAP Build Work Zone, standard edition - BWZS
• SAP GUI for HTML - webgui

workzone, btp launchpad, flp, btp flp, apc, Upgrade: websocket, 403 Forbidden, 403, Forbidden, Upgrade, websocket, btp, cf, readyState, sapdelim, origin, SAPC_CROSS_ORIGIN, white-list, white list, whitelist, allowlist, allow list, The access to the APC application has failed because the corresponding cross origin entry is missing, APC cross origin access has failed for origin , KBA , BC-MID-AC , ABAP Channels , BC-MID-SCC , SAP Cloud Connector On-Demand/On-Premise Connectivity , EP-WZ-BCI , Business Content DesignTime Visualization , BC-FES-WGU , SAP GUI for HTML , EP-WZ-SM , Site Directory, Site Settings, Site Service, IAS Integration , Problem