UserAgent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3365.0 Safari/537.36

Steps to reproduce the problem:
there are no real steps to reproduce the bug...
i was browsing and went on that page https://www.reddit.com/r/Warthunder/new/
only on that page, there is a bug : some random black square appears all over the page. when i scoll or move with the key arrows they randomly dissapear/reapear. (they don't "move", i can see a frame where they aren't here)

What is the expected behavior?
i tried to inspect one. and clicking makes them random again. hovering the elements in the devtool makes them random...

i tried deactivating my extensions : they still appear.

i tried the url in a "clean" chromium (--user-data-dir=c:\clean_chromium) : it doesn't bug.

What went wrong?
i'm afraid that if i reboot chromium, the bug will be gone. i'll try and keep the tab open as long as possible to provide you more info.

ps : not sure where to post this bug.

Did this work before? Yes 

Chrome version: 67.0.3365.0  Channel: n/a
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: 

i updated chromium this morning, bug didn't note the last version i had. any chance i could find the last version installed ?
 

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