I posted a while back about a mature camphor tree in my front yard that had been growing thin over the last few years, with numerous dead branches and live branches having fallen off. It was unclear what the problem was, but after having an arborist come out and take a look, I was told it didn't appear to have any disease but was thinner since it's a male tree and probably just needed more water since we have been going through a drought (northern california, zone 9). Since then I've used a soaker hose to regularly water the tree during dry periods. The tree has thinned out even more though, and has been losing numerous branches with every storm (whereas the mature female camphor on my property loses almost none). Taking a look at the downed branches, I've noticed that they all appear partially black where they attach to the tree, as if they've lost part of their attachment (see pictures). Any pointers or ideas on what could be going on?