pdf file - size 0

Hi,

When I upload a pdf file to any channel, the upload notification says it completed successfully but it also shows a zero file size.

If try to open that file in the channel, I can't.

Upload dialog:

Upload notification shows file size as zero bytes

And if I try to visualize it, Teams says it isn't possible:

If I download it, the file size is also zero bytes.

I'm using Teams client for Ubuntu 20.04.