3375556 - Language switches from Traditional Chinese (ZF) to Simplified Chinese (ZH)

You logged on to the Fiori Launchpad with Traditional Chinese (ZF) and found that some fields in SAPUI5 app is showing Simplified Chinese (ZH).

From the network trace, 

Request URL:
https://<hostname>:<port number>/sap/bc/lrep/flex/data/<component>?sap-client=xxx&sap-language=zh-Hant
Request Cookies:
sap-usercontext: sap-language=ZF&sap-client=xxx
Response Cookies:
sap-usercontext: sap-language=zh&sap-client=xxx

SAPUI5 version 1.84.* or 1.96.*

sap-language=zh-Hant, sap-usercontext, /lrep/flex, ZF, ZH, Traditional Chinese, Simplified Chinese , KBA , CA-UI5-FL-CLN , Flexibility Client Infrastructure , CA-FLP-ABA , SAP Fiori Launchpad ABAP Services , Problem