Why does the bottom of the page SOMETIMES disappear in Chrome in the print version?

Question

Drupal

Good afternoon.
The site is on Drupal 7. In the printed version in Chrome, the bottom of the page is SOMETIMES missing, in particular, 1 or 2 lower simple-blocks and a footer. Print.css is included, these blocks are not hidden in it. Prints fine in Firefox! Maybe someone came across?
How it works: the blocks are one below the other, the width is 100%, the height depends on the content. If you somehow shift vertically (hide / add blocks, for example), the bottom of the page may appear in the print version or not. Floats nan. If you set floats for some blocks, a vertical shift occurs and the bottom of the page may seem ..
Maybe there is some kind of tablet?

Answer 1

Maybe there is some js-script in front of the missing blocks, which works synchronously and cannot be loaded, as a result of which the rest of the page waits indefinitely for it to load...