Hi all,
We’ve just found a bug in App Server 1.13.3, so we’ve released a new version with a fix! If you’re using 1.13.3, you should probably upgrade to 1.13.4. (If you’re happy on 1.13.2, you’re not affected - but you should upgrade for the extra goodness anyway 
)
The bug affects exception handling after you’ve invoked blocking code, and could lead to exceptions escaping try/except handlers. You probably don’t want that.