Jerome

And Lot went up from Segor and settled in the mountain, and his two daughters with him. For he was afraid to stay in Segor. It is asked why, when he first preferred the mountain of Segor for his escape, and wanted to be saved in it as his dwelling, he now flees from Segor back to the mountain? …

Hebrew Questions on Genesis ↗

Bede

Lot went up from Zoar and stayed on the mountain with his two daughters. He had feared to stay in Zoar. He hurried to ascend the mountain from Zoar because he recognized that this was more pleasing to the angels through whom he was rescued, fearing that the city which at the moment of his intercession had escaped the danger of death might later, due to the citizens' sins, be consumed with a similar destruction as the neighboring cities; he feared greatly, since he knew that it had been frequently devastated by earthquakes in earlier …

Commentary on Genesis (Hexaemeron) ↗