Open Street Map not printed using lizmap print tool

Hi all,
I have a project with the print tool correctly set, I’m able to print all my overlay layers but OSM as baselayer is not printed. If I try to make a wget request to a tile (eg. wget https://tile.openstreetmap.org/11/1078/740.png) I got a 403 forbidden error. Specifing the same user-agent of the getprint request from lizmap (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36), I got a 418 BLOCKED. If I modify the user-agent (eg. removing the Safari/537.36) I got 200 OK.

wget --debug https://tile.openstreetmap.org/11/1078/740.png  --> 403 forbidden
 
wget --debug --user-agent="Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36" https://tile.openstreetmap.org/11/1078/740.png --> 418 BLOCKED

wget --debug --user-agent="Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159" https://tile.openstreetmap.org/11/1078/740.png  --> 200 ok

The print tool works percfectly in other projects on a different server even if the get print request has the same user-agent and without any modification.

Any suggestions?

Thanks in advance!
Roberta