
People are pointing out that Hajin can't swim even though he could even if og Hajin couldn't is a plot hole. Let discuss this more seriously, ok?
1. His body remembers the trauma. Consciously, he maybe different than og Hajin, but body wise, he's og Hajin. So if og Hajin's body is so traumatized by it, he can't do anything about it. He couldn't do something as simple as drink much alcohol or eat spicy food, even though he could do it in his original body. Now imagine if it's something as serious as a trauma.
But if the body remembers the trauma, then he should have at least feel unease when he see the pool or something, right?
Except, the mind and the body are not in sync as of now. The trauma(s) are not in domain because his mind doesn't even know they exist, not until the body experience similar environment at least.
2. As for the accent/dialect. The body prioritize familiarity, like his taste buds and tolerance.
But why doesn't he speak in Busan dialect if the body reset to familiarity setting?
The way one speak is not a exactly a full body function. It's a cooperation of the body and the mind, but the primary drive would be the mind.
And who is in control of the mind right now? If we read the same manhwa then it's definitely not og Hajin.
Now as a hypothesis, sometimes people accent/dialect comes out unknowingly, right?
That could be possible for people who switch their accent/dialect occasionally.
But for Hajin?
One of the possible reason might be because og Hajin could have stop speaking Busan dialect since long ago. Seeing as how nobody is pointing out that he has stopped talking in Busan dialect. It must mean that they didn't even know he speak Busan dialect. And the family might have forced og Hajin to drop the dialect and develop to fit the standard instead, which isn't all that surprising from what we have seen so far.
For og Hajin who stop using their dialect, let say possibly since childhood, dialect tripping is hardly possible for him.
I'm done rambling now, thank you for coming to my TED Talk ヾ(❀╹◡╹)ノ~

How did her affection got to 86???? We saw her once!! Hello??

Is there a reason why it took Yanu a long time to raise his affection points towards Eyra? Even when Yanu realized Eyra is possibly the mate, it still doesn't immediately go to 86 points. Eyra needed a lot of time to get Yanu there, while other dragons just like Eyra for being the mate without knowing him personally.

Because he kept denying it. Yanu had known his mate was in Solath, he had felt it on the day Eyra was born. That’s why he lingered there. But in reality, Eyra had been raised in the Labyrinth City, having been moved there from Solath through teleportation magic. So, to the common folk in Solath, Eyra was simply someone born and raised in the Labyrinth City. That’s why, after their fight, Yanu’s affection toward Eyra surged, he finally accepted that Eyra could be his destined mate.

To add to that, Dragons can sense the moment a mate is born, I say “a” and not “their” because its not set on whose mate that dragon is. Thats why theyre fighting for Eyra in the recent chapter. Yanu was in denial because his senses this whole time was saying that the mate, or atleast the lingering presence was still in Solath. In reality, Eyra was in the Labrynth that had special concealment spells, the same spell Eyra cast on the hideout in the snowy mountains. Thats how Yanu realized that Eyra really was the mate this whole time, and I think thats when the affection reached 100. Before the part where they mutually agreed to be lovers even if they “werent” mates, Yanu was simply sort of playing around with Eyra for fun thats why his affection that time was only 3 even though they were flings, because Eyra ultimately “wasnt” the mate Yanu was looking for. I think theyre waiting for Eyra to have 100 affection towards Yanu before The two of them can be declared mates and belonging to one another, which I think will happen in the next or the chapter after the next when eyra sees Yanu in his true form, which we know why (づ ̄ ³ ̄)づ
Back when manhwa wasn't just useless angst smut and have actual good plot and world building.