Hi Paolo, from the symptoms you are describing, I think your’s is a different problem than the one that Daniel mentioned.
That what you are exporting, is it only one or several flows, respectively do you export individual players? With the known bug, an export may get stuck at the start of a new flow or player. Also, everything just hangs, but does not show as ‘not responding’, therefore I think your’s is different. I’m currently on vacation and need to ask others to symbolicate the process samples you’ve sent, so it might take some time before I respond again.