Not when using Litchi. It will continue the mission to completion, since Litchi is deigned to run missions autonomously.
That is the whole point of Litchi - to be autonomous and not be reliant on a connection.
But you’d lost connection. How would it know you’d pressed RTH?
It will have flown, or tried to fly, the remainder of the mission, and then done whatever you had it set to do at mission competition … Return to 1st waypoint, reverse, etc.
You’d lost connection. Litchi won’t have the data after the loss of connection.
See …
It should have the data up to the point of disconnection that you can upload to Airdata.
Ok Airdata’s site it tells you where to find the Litchi data.