I need to add a lot of boundaries to my project. But when I do it, I got a lot of areas with near 0 depth along boundaries.

How to avoid this?

Maybe I was too short in previous message...
Project over large area with a lot of islands. As a result, I need to define boundaries, all imported as polygons from shape file.
And I get a lot of areas with depth near 0m around islands. I never write logs in this places, project doesn't contain points with depth in this areas. I even get thin area with 16m depth around one of islands.
What is wrong? Maybe I define boundaries in a wrong way? If yes, how to fix this?
Maybe it's known issue in Reefmaster algorithms and will be fixed in future releases?
The only way I've found is to export shapes and edit in another application. But it is very time consuming solution.
I created small test project affected by this issue, attached.

Sorry - I missed this post before.
Boundaries that also provide depth (zero, it looks like, in your case) also act in the same way as tracks with depth points. So in this case, you have zero depths between areas of boundary that are forming isobaths. There isn't really a way to prevent this other than by removing the "provide depth" setting for the boundary - in which case you won't get interpolation to zero depth at the edges.

Thanks. Yes, set no depth is the same as don't use boundaries at all, at least in my case.

Well the boundaries will still act as boundaries, in that they will prevent the map from being generated outside of them - but if you have no data outside of them anyway, then they will not have any effect.