Water Plugin - Adding Ocean and River causes strange issue

New to the Water system in UE5 and having a very strange issue. Have a landscape setup and now working on water.

I’ve already added the ocean and it is setup and working as expected. Here’s what it looks like. The main image is my landscape with working ocean. The inset images are the problem when a river is added (you can see one peak of the landscape rising above the new water plane caused by the river.)

When I attempt to add a river it gets weird. When I add a river object, the entire landscape goes underwater (1st inset), and appears to lose all of the textures in my autolandscape texture except for the lowest one (the dirt under the water) in the areas beneath this new water level created by the river.

The river seems to be raised a significant amount above the terrain level as well. The second inset is a closer look at the “water mountain” that’s created.

If you move to a position inside that “water mountain” it looks like the third inset.

Any ideas why this would happen? I’ve tried it a number of times and always have the same result. I should note that this only happens when I have an ocean already applied. So, with this terrain, I can either have an ocean, or a river, but not both without getting this strange behavior.

Alternatively, does anyone have any ideas where to begin troubleshooting this? None of the tutorials I’ve found have been helpful as everything appears to be setup correctly (plugins loaded, edit layers is enabled on the landscape, etc.)

Also, please forgive the small inset images. Since I’m relatively new here the system will only allow me to upload ONE image.

*** EDIT ***

I figured out what is causing this issue, but I am not sure how to correct it.

Because of the way my ocean is set up (having a bay and seveal islands) I am using terrain blend mode max rather than alpha blending on the WaterOcean, which works perfectly for the ocean. However, I believe this is what is causing the issue. In order for the ocean to work, I set the spline on the Ocean object very small so it is hidden within the visible peak in the photo.

Apparently, this is causing the river to behave in a kind of inverted fashion. If I expand the spline to a size large enough to cover my entire terrain, the river works correctly, but the ocean no longer comes in and fills my bay area.

Is there a way to separate the river and ocean in a way that they work independently of one another?