Below is the Html format before posting the reply.
<p><br>Test image:<br></p><figure><img src="https://lh7-us.googleusercontent.com/wTJug3qiP8hilnHXOM-Kvkp3HYmjMgw5s_hJ5jBR7lKpH_DzNJZMXpxsvbKn3pbns-G8ut1GrCjvrcFAVbbYodDd5GF66p-jegsKKyjmFwmBRP2mXG1tHv3HsO4t5LMe7iQgGiTM5NFadO4lq1R1Z8o" width="624" height="172" data-image="iw3796b521e6"></figure>
<p><br><br></p>
<p dir="ltr">This is a test image. </p>
<p dir="ltr">This is a test image. This is a test image. This is a test image. This is a test image. This is a test image.</p>
<p><br></p>
Yes Allow External Images setting is enabled.