Kibana discover UI only displays image(URL) partially

[Onion-Skins]

Kibana version:
7.6.1

Elasticsearch version:
7.6.1

Server OS version:
Ubuntu 18.04.4

Browser version:
Google Chrome Version 73.0.3683.103 (Official Build) (64-bit) (on Windows server 2016)
Firefox 74.0 (on Ubuntu 19.10)

Browser OS version:
Windows Server 2016 & Ubuntu 19.10

Original install method (e.g. download page, yum, from source, etc.):
Ubuntu Apt installation from
deb https://artifacts.elastic.co/packages/7.x/apt stable main

Describe the bug:
I have a created a field mapping in Kibana to display image by URL.
The portrait image(w:h = 3:4) is displayed in discover UI but only upper part shows up.
Changing the width and height does not seem to help.

Steps to reproduce:

1. create a document string field to hold the URL to a image;
2. inject a test doc into elasticsearch;
3. create index pattern in kibana and maps the string fields to URL:image
   
4. click discover and show the doc you just injected.

Expected behavior:
Image should be display completely.

Screenshots (if relevant):

Errors in browser console (if relevant):

Provide logs and/or server output (if relevant):
No error in Kibana's own logs

Any additional context:
If I change the field mapping to URL/Link, the image can be displayed correctly when I click the link in Discover(popping up a new browser tab and display the image).

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[Onion-Skins]

I just found out that setting height value to some number between 1 and 130 can make the images show as complete thumbnails. Leaving height value blank or setting it too high will cause the issue mentioned above.
I am not sure if the max height value is related to image dimension or not. In my case it seems to be 130-ish.
This behaviour is not documented. Not sure if it's intentional or bug.

[kertal]

dear @Onion-Skins, tested it, and it's automatically truncated to the height of 115px, that's generally done for long content in Discover. We're about to replace the data table by our EuiDataGrid, so I'm closing this as it's not a bug and link to the EuiDataGrid issue #51531 as a reminder to check it in this new implementation. Thanks for your issue