CA is running 1.4.x branch and is setup to capture in H264 - I am not sure if this has anything to do with this bug. Honestly, I am not sure how easily this issue is reproduced.
Steps to reproduce:
1. Schedule CAs to capture (60-90 min; H264 recordings; Hold for Review)
[It appears that the trigger maybe any zipped media file over 1GB, but this still needs to be confirmed.]
2. After a while, workspace/collect/ingest-temp is filled up.
More info in comments below.