No, it's not normal. First of all, I want you to answer my questions and try some things:
1. Try rebooting your router and see if you're able to reproduce the issue by following same steps, could you explain those steps in detail for me too?
2. What firmware version are you on right now?
3. Please try resetting the router to factory defaults and see if you can reproduce this issue again.
4. Consider updating your firmware version.