Variable Data in trouble

[michaelsof47]

Good Afternoon sir. it's hard to say that the variable that uses ".obs" in each of the variables didn't update the state. for example, i use var action = "".obs. next, I have to change action.value = "hello". but, it didn't update data although I have used Obx(() {}) inside of the widget build. I hope this information too very clear about my problem. thank you in advance

[zhao004]

Is there any test code, and which getx version and flutter version are used?