Hello @Saillesh
I was able to reproduce the issue in my test B2C tenant as well. This issue is with Standard Sign-in User Flow and is fixed in Recommended Sign-in User Flow. This text is intended to be displayed only to the users who login to portal.azure.com to administer the B2C tenant and is no longer displayed in the Recommended Sign-in user flow. Below is the difference between standard and recommended user flow.
Standard
This is the generally available, production-ready user flow. No enhancements are being developed for this version. Select Recommended for next-generation features.
Recommended
This is the next-generation, preview user flow with the latest features.
I would suggest you to create a new user flow (choosing Recommended option) with same settings as of your current user flow.
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