To add new examples in NLU Training Data does not work as expected

Hello, I am new with Rasa. I installed Rasa 2.2.10, Rasa-SDK 2.2.0 and Rasa-X 0.35.1 on Windows 10 in local mode.

I tried to Add new examples with entities (Show me what’s the weather in Paris) over the Rasa X GUI. Sometimes it adds the new examples in data\nlu.yml, but sometimes not. It also creates sometimes a new file in this folder, where I can find the examples, that I wanted to add.

Do I something wrong, that it behaves like that or can I do anything that it will add the examples always in nlu.yml as expected?

Thank you very much in advance.