Azurerm_app_service ip restriction and ipv6

It appears on v2 of Azurerm you cannot specify a ipv6 address anymore, I get this error:

Error: site_config.0.ip_restriction.1.ip_address must start with IPV4 address and/or slash, number of bits (0-32) as prefix. Example: Got “2a01:0111:2050:0000:0000:0000:0000:0000/44”.

This wasn’t a problem in v1 of azurerm, is this by design?