UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/65.0.3325.181 Chrome/65.0.3325.181 Safari/537.36

Steps to reproduce the problem:
https://mp.weixin.qq.com/s?__biz=MzA3MTYyODU3Ng==&mid=2649751241&idx=1&sn=68be53a4a4562fc32cee7b1f3a492dc5&chksm=8731fc86b04675902ff8557d06ed279d8f1b326546c84e45eac1a495446f2e1e4786e737c4c2&mpshare=1&scene=1&srcid=0320nLXUl37EcakhYdoVmXIi#rd

A. With UI
   1. Navigate to URL above
   2. Scroll down to load the media like images
   3. print the page and it will freeze at preview window. the UI still respond to my clicks but it does not show the preview, neither can i print the page
B. headless chrome/chromium
   1. run ```chromium-browser --headless --disable-gpu --print-to-pdf $URL_ABOVE --enable-logging --v=1```
   2. the headless chromium stopped with no pdf generated, printing the following lines repeatly:
      ```
       [0423/101638.738949:VERBOSE1:logging_network_change_observer.cc(108)] Observed a network change to state CONNECTION_UNKNOWN
       [0423/102137.319499:VERBOSE1:logging_network_change_observer.cc(85)] Observed a change to the network IP addresses
      ```

In both situation chromium takes 100% of a cpu thread

What is the expected behavior?
chromium could save a pdf file for me

What went wrong?
it freeze somewhere when printing the page

Did this work before? N/A 

Chrome version: 65.0.3325.181  Channel: stable
OS Version: Ubuntu bionic
Flash Version: None