As community is mostly used as some basic password system, having it as a password field makes sense. Maybe this is simply a change in the new centreon web version ?

​@Alexandre Belhomme But, as I updated my centreon, I had hosts with particular communities, and now I can’t see them or be sure what they are. Is it impossible to look through the mask to see the community?

Not that i know of. Maybe you can see the values in the raw database ?