Painted Terrain Layers Reset on Save

Hello,

New to working with terrain in Unity so there's a good chance I'm overlooking something here, but I'm having an issue where upon saving my project the terrain layers I've painted reset. Undo does nothing to fix this problem. Thankfully, I've discovered this early on and haven't lost much progress. Here's a gif of what I mean:

I apologize if this has been discussed elsewhere, did a fair bit of Googling and forum searching but couldn't find a solution. I appreciate any help that can be provided!

 

Figured it out lol. Turns out I had set the 'Control Texture Resolution' lower than the resolution of the texture layers.