I've experienced similar issues with my business users and I couldn't give them a straight up answer because the printing function is handled in the background on the browser; however, a minor detail that seems to slip from the radar is that, MS crafts the content soon to be fed to the printer through the browser.
In other words, Microsoft Power BI page print logic picks up the necessary HTML elements in a form of a printable format and invokes the print process on the browser. Now, I finally figure out why there is an empty left pane on the right on every report and the reason being is that MS treats the left navigation element as part of the report. This is a bug, to overcome this bug, always try to hide the left nagivation bar before printing. I also found setting the page type to Letter and re-adjusting the visuals again helps.
Obvioulsy, this is something that MS needs to fix asap, which brings me to the fact that in the printing self-service demo, the left navigation was always hidden when they were demonstrating the printing functionality, I wonder why!
I haven't looked at the client side code but I suspect that MS handles the printing differently between browsers, so expect some discrepancy here and there.
As far as the Chrome 2-page anomaly, always print the first page because that's what it is intended to do. Lastly but not least, the bar across is another html element that gets carried away. I'd say they handle the printing poorly when they introduce new functionality/elements to the page, until they do something about it, be prepared to expect things to pop up out of the blue.
Regards,
Fahd
