Javascript page takes more than 2min to load

Dear cloudflare community,

I’ve set up an Cloudflare Tunnel to host a web application. Every first time I try to connect to my web application, the main js page takes almost 3minutes to load.

Any idea why or how I can improve this ? If I bypass Cloudflare, my website is loading instantaneously.

I can share my HAR file if needed

thx for your help