Problem with infinite generators in code playground

Question

Suppose we have a code of a generator with while True: loop. In sololearn code playground it yields only the first value, while in IDLE it works fine: https://code.sololearn.com/cx6A4eVw6pNw/#py

def natural():
i = 1
while True:
yield i
i += 1

if __name__ == '__main__':
for i in range(10):
print(next(natural()))

Codeplayground output:
1
1
1
1
1
1
1
1
1
1

What is the problem here? Or is it a bug?

Answer 1

Problem solved by @Kirk Schafer here https://www.sololearn.com/Discuss/110922/generator-problem-in-code-playground

def natural():
i = 1
while True:
yield i
i += 1

if __name__ == '__main__':
nat = natural() #save function as a generator
for i in range(10):
print(next(nat)) #use this generator

Otherwise each time we call next(natural()) in a loop it reinitializes natural function and keeps yielding only the first element.