When a page with a parallax background image is refreshed in incognito mode, the background image may disappear. In some cases it may shrink rather than disappear entirely. This only occurs in incognito mode.
What you might notice
A parallax background image disappears after refreshing the page in incognito mode
In some cases, the image may shrink rather than fully disappear
The behaviour only occurs in incognito mode
Workaround
View the page in a regular (non-incognito) browser window, or use a different browser.