Take a look at my map application. By clicking multiple times on a red marker, you will notice that the info window changes size until it becomes unusually large, affecting all other windows as well. Interestingly, previous versions of my code from 1 month and 3 months ago on a different server did not have this issue. However, all three copies now display the same problem. Upon inspection, I see that the element.style is causing an unexpected height, and any attempt to change it using Chrome's developer tool results in the window reverting to its original undesired size.
Given that no code changes have been made, it seems likely that there has been a change in the Google API or similar, though I have yet to find any documentation to address this issue.