URL is inserted with weird string when viewed on mobile phone

I have an asp.net site at http://192.168.254.216:89/ and use form authentication.

When I open a page on my iPhone (or Ipad), it redirects me to the login page, I enter user name and password, then it redirects me back to the page i've requested but weird thing happends.

For example: if i open the page http://192.168.254.216:80/View/View.aspx, the url is then replaced by

http://192.168.254.216:89/(F(dHp6KzK8WNQ28mnU4acHp056umSU_cDQwhhhpJUY6UfHnUw7Wi85iH5AJUFoLpPIEo093o61vUIRPthIa4EIgJ9x-F-F6hc0-Uw0FFVRB7wqTJ9tgXU8vRXTp0g7SWDHG-jx7fjoHZcgbQ3GR8L3Yu55yxnHCNhQ3C5KgJyNvA1))/View/View.aspx

After that, if I click on a link on the page, it redirects me to the login page, i think i also lost the authentication

I've tried both Safari and Chrome on iPhone and iPad, same thing happends.

If i view the web site on laptop, everything is ok.