A client has a Singles entry with a Matrix block defined that contains a few text fields, and one image field. They've created approximately 450 instances of this Matrix block, and can no longer update the page. Craft throws a 500 error. Craft logs just show a basic
exception 'Craft\HttpException' in /srv/[clientName]/releases/20170418025256/craft/app/controllers/TemplatesController.php:59
and nothing of use in the Apache error logs. Anyone have experience with this sort of error, or confidence that this would be a Craft bug?