Hi, there. Thank you for reaching out. Hope that you could get the best recommendation and suggestion from our DJI co-pilots here in the forum that already upgraded their IOS version. Thank you for your continued support.
I updated DJI GO 4.3.18 and iOS 12.3.1 this morning.
At the launch of DJI GO I did not encounter any problem. It remains to test this new combination with the drone !