We are unable to replicate this, so please follow the steps provided in this help article:
If the issues persist after that, please reach out with screenshots and provide further details to our support staff at email@example.com.
Yahoo FinanceNigel Clark commented
I have similar problem. I have been able to add "Henderson Fixed Intr Mth Inc I Inc (GB00B7GSYN71.L" to my portfolio but no market data is showing in my Portfolio listings.