Bench start& not working in erpnext

I am using bench start& in cloud erpnext to run bench continuously in background, some of the customisation are not working. But when I use bench start it will work correctly.
Can anyone please tell me what is the problem?

can you share snippet of the error it is showing?

Thanks for replying @Darpan_Agarwal, I just checked putty and no error shown, also it’s working correctly but now if I close putty codes not working.

Hii i am also facing same issue when i am running bench service in background through bench start& after closing putty not able to see the standard notification message of erpnext.
Example if i want to submit any form and missing any mandatory field so no error message " abc mandatory field missing" like that is populating just i am not able to submit the form.
but through manual bench start it is working fine
please help