With signs need to check if block above is not a sign

when I was working with same part of api for essentalsTP, I found out that if you break block below sign it breaks sign above.

also if sign is on block block will still break but sign may sometimes stay there  supose you could check for sign as you would check if a itemframe is on on it and if so dont break it..

hope I'm helping I'd love to help more as my plugin dose pretty much what the core essentials plugin dose just only TP side