With regards to the “runners theory” in a twin flame/twin soul dynamic, Source counsels thus:
In a bona fide twin flame union, the two don’t necessarily run but learn how to stand in their own Self Love. That could be interpreted as running, however, you do not need to choose to see it that way, for running has a fearful connotation that one is trying to get away from the other. We would say rather that one is more prone to have issues with Self Love. When the other allows the space needed to find Self Love, he/she understands that the other is never really running away from him/her but towards Self. All beings are raising in consciousness, so let go of the meme and understand, there is no running or chasing. There is only the path to Self Love.
~~ from Higher Self