Blur effect doesn't properly reset RenderTexture after disable

[OrionFive]

So maybe I'm using it wrong, or it's my setup. However, after enabling BlurEffect and disabling it again, the RenderTexture doesn't scale correctly anymore.

My setup is as follows:

• A camera ("App Camera") that renders regular screens on the UI layer to a render texture called "Modal Overlay"
• A second camera ("App Camera Modal") that renders an UIBlock2D ("Screens Render") with the "Modal Overlay" texture and any modal dialogs on top. It renders to the screen.
• The UIBlock2D with the RenderTexture has a BackgroundBlurGroup and a BlurEffect component.
• When I want to blur the background and show a modal dialog, I enable the BlurEffect component, and after I disable it again.

This works correctly in stand-alone applications and the editor, but breaks on mobile and when using the device simulator (however to reproduce the issue in the device simulator, I have to switch to a device with a different resolution).

When I inspect the render texture, it looks fine.

On the UIBlock2D and device output it's misaligned, though.

So far I couldn't find a way to properly reset it after disabling the BlurEffect. Any ideas?

Here's a video showing the setup and the issue.
https://github.com/NovaUI-Unity/Feedback/assets/13980562/7724c3a3-45ef-4e34-9ab9-96d85caa0d7a

[OrionFive]

From what I can tell, the issue is not with the UIBlock2D. If I create new one at the same size and assign the RenderTexture, it's also wrong.
Also, any regular texture works just fine too.

The only fix, apart from restarting the application I have found so far is a quirky one:
If I duplicate (Ctrl-D) any RenderTexture file in the project (creating a new one does not work), it renders correctly again.

Big headscratcher for me. How can I recreate this fix in code at runtime?
EDIT: So saving the scene or project also fixes it. I think it's probably some refresh of the asset database that also occurs when duplicating the RenderTexture. Not very useful at runtime.

[OrionFive]

So I've found a workaround:
I've created a separate UIBlock2D for showing the original "Modal Overlay" RenderTexture. The blur effect, also with the same RenderTexture is a separate UIBlock2D now. Instead of enabling/disabling the BlurEffect I activate/deactivate the entire object now. For some mysterious reason, this setup keeps the RenderTexture from fudging up. I feel it's a bit heavier since it has to render both "Modal Overlay" and "Blurred Texture" at once now, but with deadlines looming this is good enough for now.