I've been developing my own color (C-41) for a while now and have never had this problem until recently. I use a Jobo machine with flexicolor developer and champion blix. My negatives (Portra 400) compared to when I got it developed recently at the lab look very different; the lab's have an obvious orange mask whereas mine almost seem to be missing it completely. Only when held up to the light can I see some orange in my negatives. Whenever I try to scan the negatives that I've developed, this is what I get:

Film from the lab scans fine.

All of the chemistry I'm using is fresh and I haven't changed what I've been doing in my process at all. What could be the problem?