Memory oddity - should this be flagged in PkHex as illegal?

[da72107]

Hi everyone! I'm hack checking a pokemon that I obtained recently, and the OT memory is " [mon] became [OT's] friend when it came through Link Trade in a large town. The Pokémon remembers that it got lighthearted." PkHex said this was legal, but I noticed the specific wording implies the pokemon first met this trainer through link trading, when it is referencing the OT and has data from being hatched by that OT. Is this legal/possible to get?

Thank you for any thoughts or experience you have on this!