why checkbox automatically deselects and how to sovle it?

why checkbox automatically deselects and how to sovle it?

hi

there is list with 2 variants of checkboxes checked

variant_1, before script



variant_2, after script

script is

"
// search entry by ID
record  =  zayavki_form  [ID == input.record_ID];

// check on in a list "email_process"
// value of checkbox "subscription_page_visited" 
//  (in input.email_process variable)
record.email_process = input.email_process;
"



why after script execution "SMS_subscription_sent" is unchecked?