Hello, Lord!

There are no bugs related to Sapphires' disappearance. Please follow this article to learn where the Sapphires can be spent. 

If you consider the Sapphires have been lost due to a bug, please provide us with the steps to reproduce the issue. Here is an instruction how to report bugs.

wineslob said:

I cannot reproduce the "issue". I left the game, came back the next day and they were gone. I made no purchases that I know of, and don't see any items in my inventory that weren't there before.

Sapphires can be removed from a balance in case the in-game purchases. Also, there are no bugs which affect Sapphires balance. 

Please check the most frequent purchases described in the article. It can help you to clarify the spending. 

Since the issue has not been classified as a bug, the topic will be closed.