Help needed regarding shutdown lifespan event

[achaayb]

Hello guys, currently working on an asgi framework flask style, nothing serious
the idea is that i want to have a Threadpool aswell as a Processpool and i need to catch the shutdown event so i can close the pools
Here's the link for the repo for reference : https://github.com/achaayb/CoreAPI

my issue here is on the lifespan events i can print when lifespan.started but when i have a print statement on lifespan.shutdown nothing prints, if anyone could help me that would be very much apreciated