October CMS media library flickering in overlay.

[chocolata]

• OctoberCMS Build: 458
• PHP Version: 7.3.9
• Database Engine: MySQL

Description:

When opening the mediafinder in an overlay window, the folders and files flicker erraticly and are sometimes (partially) hidden. No error message in the console appears. The issue does not appear when navigating to the mediafinder directly.

Steps To Reproduce:

Create a repeater in a tab on a static page like so:

{repeater name="images" tab="Images" prompt="Add"}
{variable name="src" label="Image" type="mediafinder" mode="image" span="left"}{/variable}
{variable name="alt" label="Alt" type="text" required="required" span="right"}{/variable}
{/repeater}

Go to the backend, and add an image via the newly created repeater. The media finder opens in an overlay and should flicker. I've made a screencast to document this:

https://www.youtube.com/watch?v=yMyHG07iyVc

Please note that the flickering seems to stop upon resizing the browser window.

[w20k]

@maartenmachiels it's a duplicate of this issue: #4601
Chrome 78 should fix that.

[chocolata]

Thanks! Chrome 78 hasn't been rolled out yet here, but I'll look out for that one. Sorry for the duplicate issue and good to know you guys are on it.