You are flying a mission whose configuration causes a loss of signal. This would cause the drone to go into RTH mode (assuming DJI Fly drone). However, after regaining the signal, you would choose to attempt to try again from the point at which the signal was lost? This sounds like a recipe for disaster. Unless something has changed, the drone would loose the signal again and go into RTH mode.
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Ok, so too many assumptions.
Temporary signal loss is just that, a temporary interference that goes away “soon” after, restoring proper signal, even on RTH and re-starting same mission. It would be ridiculous to suggest re-attempting any similar action on permanent signal loss - thus the reason to state repeatedly “temporary signal loss”. So, the suggestion is not to bang your head against flying in a zone where no signal could be regained.
There are a few possible scenarios, of which one is that the drone is just hovering at the last point of control (point where temp signal loss occurred), and possibly one where the drone is set to RTH. The two are mutually exclusive - also, the Litchi would be informed of what the drone is doing at the moment of regaining signal.
The most logically thing for Litchi to do is to establish whether control can be regained - no disaster there. If time to signal loss occurred long enough ago, and the drone RTH’ed, then it is logical that gaining control is similar to any other interruption to RTH - if the drone allows same - no disaster there.
Should the drone be in RTH at time of regaining control by Litchi - provide the option to the operator to decide whether aborting RTH and returning to last known point and resume. Also, if the drone is still hovering above the last known point, leave it to the operator to decide on RTH or resume.
Why do you want to pre-determine that it can only be a disaster on temp signal loss? All of these issues are multi faceted situational issues. Provide the operator with more logical choices, which is for the operator to assess given the reality, rather than an apriori pre-emptive blind restrictions excluding the obvious.
Again, the proposal is totally realistic - and again, analogous with “pause” “play” during a mission.
I can see where a RTH would be very irritating and costly if mission time was limited and you didn’t have time to retry the flight. Possibly something like a “Wait” button next to the RTH and Hover buttons in Setup that would give the drone a limited time to begin receiving signals again before an automatic RTH started. Any future intermittent signals could also trigger a RTH if desired. @Kaehn, is something like this possible? Thanks!