Dashboard Crashing After Post Update

On every post since the 4.3.1 update, when I hit update or schedule, I get Fatal memory error. After refreshing the page multiple times I can get the post again, but the page will be blank and at the bottom of the editor it will say “finding editor” Then it will say “editor not found…retry?” I have increased available memory to wordpress. I have deactivated all plugins and reactivated them one by one. I have changed themes to default theme. The errors do not change. The memory error seems to occur a lot in options.php.
The problem in no way interferes with the front page and only occurs on the admin dashboard.
Any one have any idea what this is?