Issue with post images not displaying

## Prerequisites

- [x] I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
- [x] The issue still exists against the latest development version of Elementor.

## Description

## Steps to reproduce

## Isolating the problem

- [x] This bug happens with only Elementor plugin active (and Elementor Pro) with development versions.
- [x] This bug happens with a vanilla WordPress theme active ([Hello theme](https://wordpress.org/themes/hello-elementor/)).
- [x] I can reproduce this bug consistently using the steps above.

## Environment

System Info
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