test plan is not getting executed while using 1 thread for one loop and using throughput controllers inside the thread group

i have a test plan in which

distribution of throughput controllers is

post and get 1 => 10%
post and get 2 => 40%
post and get 3 => 25%
post => 25%

if i run the test plan with loopcount = forever then it is working fine with single thread or multiple theads

but if i run the test plan with loopcount = 1 and threads = 1 it is not even starting the test.

How to fix it?