Some contact core tokens stopped working in 5.43 RC

Some contact core tokens stopped working in scheduled reminders & send email in the 5.43 RC

Does render in subject:

{contact.id}
{contact.contact_type:label}
{contact.display_name}
{contact.middle_name}
{contact.last_name}
{contact.email_greeting_display}
{contact.phone}
{contact.city}

Does NOT render in subject:

{contact.first_name}
{contact.birth_date}
(and maybe more)

Does not render in the body:

{contact.id}
{contact.contact_type:label}
{contact.display_name}
{contact.middle_name}
{contact.last_name}
{contact.email_greeting_display}
{contact.phone}
{contact.city}

... I actually cannot get any contact core token to render in the body field of the template

All my contact custom tokens work fine in subject and body though