This is a translation of this Korean netizen( lets call him A)'s take on JH/SY's departure from WGM:-
- A said on 8/8 when A saw that the next episode's preview was @ jeju, A was really surprised because it was the filming contents of 5/8-6-8, the way WGM does things usually is to keep a month at least between the broadcast date and filming date, so A felt that something was wrong, based on the fact that there was no "back-up"/"stock" for the episodes, it seem like they decided to depart from WGM during July.
- In fact, this could be deduced from the conversation that SY had with JH's manager on IG. Manager said we have to meet again on 8/5, and SY replied that is it a farewell trip? So A deduced that 7/8 when they filming the rooftop park + horror movie, they have already decided to step down.
- As to the reason for their departure? A thinks that ever since Busan, the two's progress have been very