[Samba] problems upgrading samba to 4.12.15

[Piviul]

On a debian buster machine I have installed the louis samba 
respositories and the 4.12 samba packages. After upgrading samba from 
2:4.12.14+dfsg-0.1buster1 to 2:4.12.15+dfsg-0.1buster1 I have a problem 
using % macros: %I on a "print command" directive send the ip 0.0.0.0 
instead of sending the ip of the client.

There is a bug in the 4.12.15 version?

My best regards

Piviul