Fix pathological case with CDT cavity doubling back on itself

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (54a20f0) 94.26% compared to head (22a5128) 94.26%. Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #98 +/- ## ======================================= Coverage 94.26% 94.26% ======================================= Files 75 75 Lines 5612 5613 +1 ======================================= + Hits 5290 5291 +1 Misses 322 322 ```

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[DanielVandH]

The new loop will make the tests take a lot longer, but I have a fix upcoming that speeds up the tests by about 150x.