fpsplayer/ Rust ++ server... C4 broken? HELP

helping a friend setup his fresh wiped Rust server 3/1. Our server is having problems with C4. It takes more than 10 C4 charges to destroy a wood wall. Anyone know whats the problem?. we are fairly new to hosting server’s. We don’t know if its a admin setting that we need to change or its a bug. Help please

You using rust++ or Magma?