Repro steps:
(1) Save a password on https://www.namecheap.com (e.g., via chrome://flags/#enable-password-force-saving and context-menu).
(2) Load https://www.namecheap.com/myaccount/login.aspx

Expected: The saved password is filled.

Actual: Nothing is filled, not even the password field alone can be filled on demand.

Looking at the logs (below), PasswordAutofillAgent detects the form, asks browser to dig up the saved passwords, browser does and sends back, and then PasswordAutofillAgent cannot find the form again.





Message: PasswordAutofillAgent::DidStartProvisionalLoad 
The new state of the UI: 0
Message: PasswordAutofillAgent::SendPasswordForms 
only_visible: false
Security origin: https://www.namecheap.com/ 
Number of all forms: 2
Form is a password form: {
Action : https://www.namecheap.com/ ,
New password element : ,
Origin : https://www.namecheap.com/ ,
PSL match : false,
Password element : LoginPassword ,
Password generated : false,
Scheme : HTML ,
Signon realm : https://www.namecheap.com/ ,
Times used : 0,
Username element : LoginUserName 
}
Message: PasswordManager::CreatePendingLoginManagers 
SSL errors present: false
IsPasswordManagementEnabledForCurrentPage: true
Number of pending login managers (before): 0
Adding manager for form: {
Signature of form: 14675362245278660348
Signon realm: https://www.namecheap.com/
Origin: https://www.namecheap.com/
Action: https://www.namecheap.com/
Form name: aspnetForm
Form fields: 
ctl00 ctl00 ctl00 ctl00 base_content web_base_content siteSearchQuery: 2373247994, search
LoginUserName: 966024577, text
LoginPassword: 3285376859, password
LoginUserName: 966024577, text, on
LoginPassword: 3285376859, password, on
email: 1029417091, email
ctl00 ctl00 ctl00 ctl00 base_content web_base_content siteSearchQuery: 2373247994, search
}
Message: FormFetcherImpl::Fetch 
FormFetcherImpl::state_: 1
Number of pending login managers (after): 1
SSL errors present: false
IsPasswordManagementEnabledForCurrentPage: true
Server predictions: {
Signature of form: 14675362245278660348
Origin: https://www.namecheap.com/
Action: https://www.namecheap.com/
Form fields: 
ctl00 ctl00 ctl00 ctl00 base_content web_base_content siteSearchQuery: 2373247994, search
LoginUserName: 966024577, text
LoginPassword: 3285376859, password
LoginUserName: 966024577, text, on
LoginPassword: 3285376859, password, on
email: 1029417091, email, SERVER_PREDICTION: EMAIL_ADDRESS
ctl00 ctl00 ctl00 ctl00 base_content web_base_content siteSearchQuery: 2373247994, search
}
Message: FormFetcherImpl::OnGetPasswordStoreResults 
Number of results from the password store: 2
Message: PasswordFormManager::ProcessMatches 
SSL errors present: false
IsPasswordManagementEnabledForCurrentPage: true
Message: PasswordManager::ShowInitialPasswordAccountSuggestions 
wait_for_username: false
Message: AutofillAgent::OnShowInitialPasswordAccountSuggestions 
ambiguous_or_empty_names: false
Number of potential forms to fill: 0
form_data's wait_for_username: false
Message: PasswordAutofillAgent::SendPasswordForms 
only_visible: true
Security origin: https://www.namecheap.com/ 
Number of all forms: 2
Form found on page: {
Action : ,
Form name or ID : aspnetForm 
}
Form is visible: true
Form is a password form: {
Action : https://www.namecheap.com/ ,
New password element : ,
Origin : https://www.namecheap.com/ ,
PSL match : false,
Password element : LoginPassword ,
Password generated : false,
Scheme : HTML ,
Signon realm : https://www.namecheap.com/ ,
Times used : 0,
Username element : LoginUserName 
}
Form found on page: {
Action : ,
Form name or ID : 
}
Form is visible: false
Some control elements not associated to a form element are visible: false
Message: PasswordManager::CreatePendingLoginManagers 
SSL errors present: false
IsPasswordManagementEnabledForCurrentPage: true
Number of pending login managers (before): 1
SSL errors present: false
IsPasswordManagementEnabledForCurrentPage: true
Message: PasswordManager::ShowInitialPasswordAccountSuggestions 
wait_for_username: false
Number of pending login managers (after): 1
Message: PasswordManager::OnPasswordFormsRendered 
Message: PasswordManager::CanProvisionalManagerSave 
Message: No provisional save manager 
Message: AutofillAgent::OnShowInitialPasswordAccountSuggestions 
ambiguous_or_empty_names: false
Number of potential forms to fill: 0
form_data's wait_for_username: false