Was flying early this AM,everything seems normal except for this,
I think 3 from what I can observe fast flashing yellow light. From the Manual (latest ver) it stated that "Remote Ctlr Signal Lost" (pp 12 "Warning, AC Stat Indicator").
The thing is I can still ctrl the AC and there's no warning notification on the App. Does anyone observed this behavior on your AC?
If so, do you have any idea what it is or should we be worry?
For sure we are aware (for those who already seen this), but what is it?

With everything turned on, go into the DJI Go 4 app settings and have a look under Warnings to see if there is anything there. It may be that you missed the warning on the screen.