There are certain situations where it is really annoying that a rider of a
mount gets automatically dismounted. To mention some of them:
Rescue to a ship
Using overland flight skill to fly to ferry (probably would happen with
memorized locations too)
Using a continental portal (to Esiris for example)

I am not sure if there is some code based reason for this, but it would be
great if the rider would stay in the saddle. In all of these situations I
would not want to jump off the mount and would usually like to continue moving
immediately. Any chance this could be "fixed"? These situations would most
likely be the ones where I also permanently lose my mount -> Getting back from
Esiris and forgetting to store my mount and going ld for example.

P.S. Yes, creating a trigger is possible!