In manual mode are there any limit/restriction how far it can go?  I was flying in manual mode about 325ft hit about 1380-1400ft away and it say it can't go into manual mode.  So I switch over to S mode and fly back to 1260-1290ft and it entered Manual mode again... flew out again about 1325ft and then it said can't go to manual mode.
but in S mode or N mode I can fly.... almost 9000ft.

Hi there. Thank you for reaching out and we're sorry for the trouble that this has caused. Can you please try to fly to a different location to see if the issue persists? I will also forward this to our designated team for further clarification. Thank you for your valued support.

I have seen this as well, in my case I was entering a restricted (height) zone by mistake.