Is it there a way to selectively upload only new items?
I have created new contents today, in the same conditions I used to have this problem and everything seems to be running fast and smooth this time.
You can see my blog at https://nuvogue-electronics.com.mx/blog/
So we can say the solution was to add the slash at the end of the public_html/blog/ as kosi77 suggested.
Thank you very much. This topic has been solved with your help.