I'd wait - if there's a warning. I'm waiting on at least two series where the author clearly would love to keep going and going, but life gets in the way, because I'd like that same respect offered to me if anything happened with my work as well. Also, no one can go on forever unless they've actually finished whole chunks before starting to begin with, so if they're the type to make whole chapter, stop a long time, make another whole chapter, then it's fine by me.
Becomes a problem if they just go radio silent though. Page stops halfway through the chapter and nothing in the description, no updates, no wall messages, their social goes on like a comic never existed? I'm unfortunately unsubscribing, there's little hope it's coming back. If they straight up disappear I'd get worried of course, but also I'm a random person on the internet that happens to be a fan of their art, I can't tell if something bad happened, or they lost the drive to make more and couldn't muster the courage to say it outright/can't admit that it's not coming back in this form.
(Not implying that's a horrible artist sin and you should always make those decisions, life is hard, mind stuff gets in the way and the comic is just a bunch of pretty pixels; just that from the outside, there's no longer a point in waiting)