I want to remind you what Greg said one time on X about Oda's quotes about his lifestyle and work: basically Greg said that most of the time what Oda said about his work hours is false. Because in Japan the work of an artist is almost considered a "fake job",not really worth of the same respect of other jobs. So artists usually to appear "better" for the japanese society standards,do exaggerate with what they say about their jobs,saying they work 24/7 etc. Greg also said that Oda sometimes is pretty hedonistic and parties a lot,like Luffy.
So i am not saying that Oda doesnt have health problems or that he doesnt work a lot,because we all know he does,and Greg didnt deny that either. But,the reality is probably "in the middle". His work conditions are not so bad as certain interviews made it seem.
But,this unexpected break is surely not a good signal,thats true.