New Mini4Pro. Since new I have had jerky video, perhaps 20% of footage. Live feed can be jerky, maybe local interference. Some recordings mimic the live recording jerkiness, other times recordings are ok. Using different sd cards (including dji recommended) - no difference. Even happens in open countryside, at most unexpected times. Contacted dji - usual try this and that, but nothing changes. I think recording to internal memory is ok, even when live streaming is jerky. I never fly it far, at most 500 meters. Not a playback issue - same jerkiness at same spot on footage, whether played on pc, phone, or iPad. Could it be hardware issue, problem writing to sd card? Any thoughts?