Bad connection causes timeout

Hi all, i’m currently in my school and we have very poor internet connection.

For the TAN Network challenge when i do the test cases i got success and in the same time process has timed out for the 3 last tests.

So my program does provide output in time , because it says success, but it tells me it timed out.
And when i submit i got totally random %, once 85, once 39, once 69.

I think the problem comes from my school’s connection but i was wondering if this is to be expected ? Because the “travel time” shouldn’t matter in the computation of the execution time