Dot "." at the end of a variable name causes an error code when creating a page based on that template

Issue Summary

If a variable in a user-created template has a dot "." at the end of its name, when creating a new page based on this template, it will stay blank and return an error code at the bottom of the page upon clicking on the selected template.

Steps to Reproduce

1. Create a user template at Confluence Settings > Global Templates
2. Add a variable
3. Edit the variable and add a variable name with the dot at the end. For example: variable.
4. Save Template
5. Hit Create page
6. Search for the template name and click on it

Expected Results

The page will be created as expected with the template options

Actual Results

Page stays blank and thrown an error code.

This is what we see on the dev tools inside a /cgraphql?q=MacroBodyRendererQueryWithTagsRequest 200

{
    "errors": [
        {
            "message": "a0ce0ab6-3b1a-416d-a631-31129a79976d: com.atlassian.confluence.api.service.exceptions.NotFoundException: Cannot find content with selector ContentSelector{id=ContentId{id=187105325}, status=current, version=0}",
            "path": [
                "macroBodyRenderer"
            ],
            "extensions": {
                "microsID": "a0ce0ab6-3b1a-416d-a631-31129a79976d",
                "data": {
                    "authorized": true,
                    "valid": true,
                    "errors": [],
                    "successful": true
                },
                "statusCode": 404,
                "classification": "DataFetchingException"
            }
        }
    ],
    "data": {
        "macroBodyRenderer": null
    }
}  

Workaround

Remove the dot at the end of the variable(s) name(s).