Can't download Consumption data for Sonoff S31?

I try to download the consumption data by tapping the download button in the top right corner (see image) but there no evidence that anything ever gets downloaded. I looked for new files in my storage but see nothing.
Do I have to have consumption data for certain minimum period of time?
I started a realtime consumption recording and of course I have some historical consumption (about 4 hours’ worth).
What am I doing wrong?
Thank you!

Please kindly raise a support ticket in eWeLink App > Profile > Help & Feedback to show us how you downloaded it.

I went to Profile > Help & Feedback, but where do I then go from there? There are many options to choose from there, but none of them seems suitable to report this issue

Click “Feedback” on the top right corner. Please check out the attachment.