Welcome to the ultra-tropics Durianlover. Now we will take you more serious. Those things happen here, wether we like it or not.
I should keep my head down in shame. What a careless mistake! However I'm sure about every other planted tree
Never be too condifent in Asia. Even if you used labels this can happen. I have labels missing who were connected with very good wire, maybe the squirrels built a nest with it, who knows.
I won't bother you with everything that goes wrong here in thailand, just blame it on the sun and 35 degree celcius measured in the shade.
Now one of my achacha's is also in full sun all day, leaves are drooping allready but it just has to get used to that.