Gorm Broken backward compatibility with joins and preload

GORM Playground Link

https://github.com/go-gorm/playground/pull/749

Description

Starting from v1.25.7, gorm is having trouble unmarshalling data into desired struct when the query returns any insignificant rows after using Preload and Joins. Seems like it is caused by https://github.com/go-gorm/gorm/pull/6771.

Comment From: teatou

@jinzhu Hi! Any updates yet?