Failed to retrieve URL for overriden profile icon

Often we see messages in our logs that say things like:

SqlEmojiStore.GetByName: Unable to get the emoji, key=:emoji_name:, sql: no rows in result set

With a message of 'Failed to retrieve URL for overriden profile icon (emoji). Is there a way to fix these issues? We haven’t noticed any feature / performance degradation.

We’re running version 5.18.2.