Version: 54.0.2808.0 (Developer Build) (64-bit)
OS: All

What steps will reproduce the problem?
(0) Start chrome with --site-per-process.
(1) Load a page with an <input> field and an <iframe>.
(2) Navigate the <iframe> to the page attached (it is a simple page which starts counting as soon as the button is pressed.)
(3) Set the count to something large so that the renderer becomes unresponsive for a couple of second until the count finishes.
(4) Start the count.
(5) Immediately after (4) click on <input>.
(6) Immediately after (5) click inside <iframe>.
(7) Immediately after (6) click inside <input> again.

What is the expected output?
After (7) <input> should keep focus.

What do you see instead?
<input> loses focus after the count is over (the <iframe> is now focus).
 

Deleted: input.html 388 bytes

input.html 388 bytes View Download