[@angular-eslint/template/i18n] reports false-positives and false-negatives

Description and reproduction of the issue

Rule @angular-eslint/template/i18n is unexpectedly reporting errors for some texts, and does not report errors for texts it would be expected to.

{
  "rules": {
    "@angular-eslint/template/i18n": [
      "error",
      {
        "checkId": false
      }
    ]
  }
}

<div>this is reported (as expected)</div>
<div i18n>this is not reported (as expected)</div>
<div>this: {{shouldReportError}}</div> <!-- this should be reported, but is not -->
<div>{{shouldNotReportError}}</div> <!-- this should not be reported, but it is -->

Running npx eslint "src/app/**" produces following output for src/app/app.component.ts:

Full code to reproduce the problem can be found on Stackblitz: https://stackblitz.com/edit/angular-ivy-nteny3

Versions

package	version
@angular-eslint/eslint-plugin-template	12.5.0
@angular-eslint/template-parser	12.5.0
@typescript-eslint/parser	4.28.2
ESLint	7.26.0
node	14.17.0

# Please run `npx ng version` in your project and paste the full output here:
Angular CLI: 12.2.8
Node: 14.17.0
Package Manager: npm 6.14.13
OS: win32 ia32

Angular: 12.2.8
... animations, cli, common, compiler, compiler-cli, core, forms
... localize, platform-browser, platform-browser-dynamic, router

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1202.8
@angular-devkit/build-angular   12.2.8
@angular-devkit/core            12.2.8
@angular-devkit/schematics      12.2.8
@schematics/angular             12.2.8
rxjs                            6.6.7
typescript                      4.2.4

• I have tried restarting my IDE and the issue persists.
• I have updated to the latest supported version of the packages and checked my ng version output per the instructions given here.

[rafaelss95]

Oh, I actually realized that this is possible a duplicate of #682. Could you confirm it, please?

[EmmanuelRoux]

Fixed in 12.6.0 (#683)