Descriptive Problem Summary:
Certain diagonal pixel movement-enabled collisions seem to cause Daemon/Seeker to lock up.
This seems to be the result of the secondary attempt to fix this bug:
Specifically this fix is what caused it:
I've amended the test case I provided for the bug initially to include a second position that fails on 512.1438, and now freezes in 512.1439 so you can get a better overview of what's happening here:
Jul 19 2018, 7:55 pm