Azure Logic Apps: "Specified blob does not exist" error when using dynamic blob name with spaces

I'm working in Azure Logic Apps and I'm trying to dynamically update a blob in Azure Blob Storage using Azure Logic Apps workflow action named 'Update Blob (V2)'. My goal is to write an integer value to a blob in a container. The blob name is based on a customer name retrieved during a For each loop. I am using 'Customer one' as an example name. When I use a customer name with just one word (e.g., Corp.json), it's works perfectly fine. But as soon as I want to dynamically fill in a customer name with spaces, it gives error.

When I hardcode the blob name (e.g., Customer one.json), it works fine and updates the blob correctly. However, when I fill in the blob name dynamically like this:

encodeUriComponent(concat(trim(string(items('For_each')?['customerName'])), '.json'))

I consistently get the following error:

"body": {
    "status": 404,
    "message": "Specified blob Customer one.json does not exist.\r\nclientRequestId: 11111111-1111-1111-1111-11111111111",
    "error": {
        "message": "Specified blob Customer one.json does not exist."
    },
    "source": "azureblob-we.azconn-we-223.p.azurewebsites.net"
}

What I've already tried:

• Wrapping the customer name with string() and trim() to prevent datatype or whitespace issues
• Using encodeUriComponent() to handle spaces
• Confirmed that the blob exists and can be updated. I did update the blob using hardcoded changes
• Verified that the blob is in the correct container and directory
• Used the Compose action to print the final blob name (= identical)

Additional Info:

• The blob names do include spaces, like "Van Der Dadels.json".
• The blob is confirmed to exist and be accessible.
• Logic Apps is using the "Update blob" action.
• Container access level is private, but credentials and connection are configured correctly.

This is where the error occurs:

But hard coding the name works: