I noticed that the DJI FLY app updated because of the new look on its interface. Since the update it is messing with the live feedback / video transmission using my old phone ( Huawei Nova 3i ).
What is weird is that video feedback becomes smooth when im starting to record video then becomes laggy/jittery again when not recording.
Temporary solution is enable / disable the "cache recording" while recording video. But this is only temporary as issue will come back when i restart the DJI FLY app.
Maybe there is a bug with "cache recording" with the latest update on DJI FlY app?

Just an update with my Nova 3i and DJI FLY app issue:

When I enable the "over-exposure warning" setting on DJI FLY APP, the issue will be gone and the live video feedback becomes smooth.
This is a really weird issue on the latest update of DJI FLY app with my phone