proxy ssl:false fails the application

[jagdishadusumalli]

I have deployed an rails 8 app on DO with cloudflare
In rails -> production.rb
assume_ssl: true
force_ssl: false

In kamal proxy settings (deploy,yml)
proxy:
healthcheck:
path: /up
interval: 2
timeout: 5
ssl: true
hosts:
- www.mysitesss.info
- mysitesss.info

In Clouflare web panel
SSL = Full
DNS
A mysitesss.info 111.222.333.444 Proxied (Shows SSL Certificate by Google Trust in web browser)
CNAME www mysitesss.info DNS Only (Shows SSL Certificate by LetsEncrypt in web browser)

Both hosts stops working when i do ssl: false In kamal proxy setting (deploy.yml)

I have to turn on the ssl:true for both hosts to work.
I was able to check which cerfticate was getting applied to the host (see the DNS section above)
by turning the cloudflare proxy on for one host and off for other.