I have seen and experienced the same problem. Many people have this issue. The problem is that the Realtime_DB1 Get block is asynchronous. If you want to use it more than once, you must tell Thunkable to wait until it is finished.
There are many possible solutions. Below is my current favorite solution.
Create a Get Cloud Property function EXACTLY as show. You can then use this function anywhere you would otherwise use the Realtime_DB1 Get block as I show in the example “Any Button” click event. This example uses a list parameter called “KeyPath” to map the JSON key hierarchy. The Return values is whatever it finds at the end of the path. For your example, it returns the value in Title.
Happy Thunking!