Hi, I have just moved in 6 months ago and I noticed one of the branches of my Japanese maple tree is drying so I cut the branch off. (pic 1) Later, I noticed the wood feels kind of soft but the wood under it feels alright. I removed the soft part of the bark (pic2). I asked the local nursery and they asked me to cut off parts of the stem to prevent any potential spread of disease. I am not sure whether I want to do that yet. Please advise on why the wood could be soft. Do I need to do a drastic act of cutting the stem of my Japanese maple. Please advise.