Autoaction login fails with latest build and joomla 5.2

Hello
I use an autoaction to automatically log in a user like this

Trigger : none
User : automatic
Access : everybody
Condition : none
Action : 
Mode login
Method username
username : [post_username]
password : [post_password]
Force login : yes
Redirect : none

Output : JSON
return json_encode( [ 
    'success' => 'true', 
    'userid' => (int) '[data1_user_id]',
    'refid' => '[data1_cb_refid]', 
    'firstname' => '[data1_firstname]',
    'token' => '[data1_cb_token_api]' 
] );

Method : PHP
Substitutions  Yes

References : Variable 1

It used to work fine until we upgraded to CB latest build and joomla 5.2.0
Since then the userid is always 0 (double checked with several usernames/password)

Made some tests on Postman but fail to understand why

Did you change something in this kind of autoaction recently ?

EDIT:
I noticed that data2 instead of data1 would now give the correct result 
Is it a wanted change ?

It should be data1 unless you're chaining multiple auto actions together resulting in additional data being set. data1 should be the user object and data2 should be the login message, but again depends on if there's any auto action chaining happening.

Took a look and believe I found the cause. A fix is being worked on for a new build release. Will also review in the future adding key based data so you'd be able to just do [data_loginuser_id] to ensure that's always what is returned.

Ok, this is now fixed in latest build release. Should properly be back to 1 index.