If it's timeout error and you increased the "Timeout" option -> report to them, it's their server issue.

Right after last update I started getting upload speed limit via api. It randomly just starts uploading no faster than 300-400k and it's 1g server.
When I stop the upload via api and retry it goes full speed. I see no pattern, it just happens whenever.
I tried rebooting server but it kept happening.
I'm using web upload at the moment and I didn't face any problems so far.
Update:
This random thing is also happening with fikper api upload.

There were no changes at all for these hosts for at least a year in my side.

It's something at their side.

I don't know. It's bit suspicious that that both hosts started having same thing happening right after the update.
When speed gets limited it's exactly the same on both hosts to exactly same speed. Then I need to stop the process and starting again for the full speed.
I followed this since i posted it few days ago, it's completely random.

I think that I still have previous version, I will compare the results.