Split Login Page ERR_CACHE_MISS when returning to ?main_page=create_account

Hi

Using the split page login, if one gets out to some page (without entering no information), and hits returns it gets ERR_CACHE_MISS.

Using the non split page login, it's all ok.

I have no logs

arriving at main_page=create_account , let's say the customer goes to the privacy policy page, or whatever, when it clicks return , will get that ERR_MISS_CACHE page.

Actually, if I do a refresh at main_page=create_account.. , it pops-out a warning about loosing the form information. But nothing in the form was fill.

Array
(
    [securityToken] => b00103a8cd1a2737d4fd5a15c10fb6a8
    [customers_host_address] => promotestes.local
    [cartID] => 
    [cart] => shoppingCart Object
        (
            [contents] => Array
                (
                )

            [total] => 0
            [weight] => 0
            [cartID] => 
            [content_type] => 
            [free_shipping_item] => 0
            [free_shipping_weight] => 0
            [free_shipping_price] => 0
            [download_count] => 0
            [total_before_discounts] => 0
            [display_debug_messages] => 
            [flag_duplicate_msgs_set] => 
        )

    [language] => portugues
    [languages_id] => 2
    [languages_code] => pt
    [check_valid] => true
    [navigation] => navigationHistory Object
        (
            [path] => Array
                (
                    [0] => Array
                        (
                            [page] => login
                            [mode] => NONSSL
                            [get] => Array
                                (
                                )

                            [post] => Array
                                (
                                )

                        )

                    [1] => Array
                        (
                            [page] => create_account
                            [mode] => NONSSL
                            [get] => Array
                                (
                                )

                            [post] => Array
                                (
                                )
                        )
                )

            [snapshot] => Array
                (
                )

        )
    [currency] => EUR
    [today_is] => 2018-04-04
    [updateExpirations] => 1
    [session_counter] => 1
    [customers_ip_address] => 192.168.1.143
    [layout_device] => desktop
    [tpl_pb_zone_name] => Lisboa
    [tpl_pb_countries_name] => Portugal
    [messageToStack] => 
)

But if I inspect with chrome tools, disabling cache , the issue doesn't occur.....

Actually, if I do a refresh at main_page=create_account
Do ignore this statement, that was happening because I have the login details save.