A strange solution to a problem and not able to fix the actual problem

Question

whenever i am trying to publish files from visual studio with FTP on godaddy server with my phone's hotspot (very good speed for example can watch videos on youtube without buffering) connected i am not able to publish files

and gets below error

"Unable to add 'Defaulttt.html' to the Web site.  Cannot open data connection (425). when trying to publish with FTP ,"

 

but whenever i connect with my friend's network (slow speed hotspot from other room) even though the network speed is slow , i am able to publish files with no error.

 

I just don't know what is the logic behind it.and how to solve this issue so that i can publish files with my own network as well.