Yes I looked at them. But it was kind of hard to reproduce the problems. I fixed some little upload problems here and there but I'm not sure if it also affect the once you describe.
In general I can say that uploads work. I see many of them. But there might be issues in some cases.
I know that Phex behaves a little more strict with local network connections on download and upload. Sometimes its enough to connect to the GNet for a short amout of time to make it behave better.

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