Omnivore does not always download images

[Dini-25]

So i am not sure if this is an issue or its the way i use this app.
Usually, i save to Omnivore using the "share to" option on my phone while browsing. I would see a link i am interested in, i would share it to Omnivore so that i can read it later.

When i then open the document later in Omnivore, i find that the article was downloaded, but it is missing some images.
As an example, i downloaded this page - https://www.pivert.org/top-50-easy-vim-commands-to-accelerate-editing/

When i checked the article later in the train where there is no internet or reception, i found that the following section is missing (i.e the two images.

Note - This only happens if i just "share" the link to Omnivore and never open it while i have internet connection. If i open the article as soon as i save it in Omnivore, i can see the images when i open the article when i am offline.

In some cases, i find that some text is also missing. Just next to the above images, there should be two headings next to the images (Original file content and After substitution) but those are also missing. Here is a snippet of the article in my phone on Omnivore (without internet access). The images and the two headings should have appeared just before the Control Key heading.

The download of images seem to be hit and miss. Sometimes they are there and sometime its only text.
How can i get it to download the images at the time i save the page (without having to open the page in Omnivore first)?

Note - I tried the same scenario by saving the article to Instapaper and i can see the images when i open the article while i am offline (i.e no internet).

Note - To recreate this, you will need to "share" an article to Omnivore. Let it save the page in the background (dont open it). Wait 5 minutes to give it time to download. Go offline on your phone (i.e disable wifi and mobile data). Open the article in Omnivore app.