Sentinel 2 download not triggered

Question

I am trying to download sentinel 2 data from the Copernicus Open Access Hub, with a python script and using the sentinelsat library. I know that the rate at which you can download data is limited: max 2 concomitant downloads. However, I seem to have problems when I try to download a higher quantity of data (10-20 queries) one after the other in a for loop, therefore not in concomitance. The command api.download(<product_id>) does not trigger the download, rather it just prints something like This is the output I get rather than the actual download happening