Rating level name not visible in calculated rating in overall summary section

Summary:

Hello Experts,

We are using manager calculated rating and manual rating both for overall summary section. 

On Production in manager calcultaed rating, only number is visible and rating level name is not appearing. On test Instance it is working fine. Used same fast formula for to calculate rating on test and production. 

Test Instance:

Prod Instance:

How can we fix this?

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