Clicking "Edit block" crashes chrome tab

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I'm having a weird problem I can't find any information on. When in edit mode, hovering over a block and then clicking the edit button has a chance of crashing the entire site for the current Chrome session. It will still work in a different browser. Reloading Apache doesn't do anything, but restarting it actually fixes the problem.

Any suggestions or ideas? I'm running the newest c5, newest dev version of chrome (although this issue has been present for the past month or so and is likely to be in stable chrome as well), on a stripped down headless ubuntu 16.04 server with php 5.6 and apache2. The theme in use is 8-Bit. Aside from this issue, everything else seems to be working well.