It's been revealed that the producer Lee Dong Hoon will be leaving the production, and being replaced by producer Oh Jin Suk.
On June 20, SBS announced, "He is being swapped out because of an internal issue, and it's not at all because of any problems with the actors. We plan on going forth with 'Yong Pal' without any more setbacks."
'Yong Pal' will air after 'Mask' in August. Hopefully there won't be any more bumps on the road for this drama!