Flutter application freezing

Question

I am working on a mobile application in Flutter to

• create a Bluetooth connection
• receive data from this device
• plot them on the screen using SfCartesianChart

Everything works fine, except that after a while, the application freezes completely. There is nothing I can do but quit the application. I have looked at the "Flutter performance" section, but I can't find any useful indication. Also, I don't see any errors on my command line. It is a total mystery. I keep looking but it's hopeless.

Well, I never understand why people are giving a "-1" instead of explaining something but I appreciate your suggestions on how I can resolve this error.