When I have problems connecting scenes, I always try to find out what is causing the disconnect.

Sometimes I find that there should be one or more scenes between the scenes I'm trying to tie together, other times it's because a character would have to behave out of character to get to the next scene.

The story I'm currently working on came to a screeching halt a few days ago, because of a disconnect that requires deus ex machina for it to work out, and now I'm agonising over which plot element to change or cut to get the story moving again.

In my experience it comes down to how much preparation you do with the setting of the story.

Contemporary stories are easier because they are about the world we live in, which happens to be quite thoroughly fleshed out with people, history and geography and such.

When writing fantasy/scifi you're starting from scratch, at least if you want to avoid having a cookie-cutter setting. That means you have a lot of inventing to do. You need a realm with nations and cities. Then comes religion and politics. And don't forget history and culture. When you have most of this you have a bunch of "landmarks" to navigate by, which makes it much easier to figure out how the story should go and what motivations the characters have.

Another great thinking-challenge fantasy/scifi has is the element of magic/technology. It's important to nail down very specifically how the m/t works, what it can and cannot do, and how this impacts the setting and story.

With good preparation you'll be able to implement the exotic elements in a natural and believable manner.

I hope this helps.