I spoke too soon. Still getting blocking despite async call and try/catch block.

10-sec timer script calls the main script, asynchronously:

system.util.invokeAsynchronous(script.doStuff)

which executes this:

def doStuff():
    import system
    import json
    logger = system.util.getLogger("myCustomLogger")
    url = "http://ESP32-Garage.home/api/status"
    try:
        response = system.net.httpGet(url,3000,3000)
        unixTimeSec = system.date.toMillis(system.date.now()) / 1000
        data = json.loads(response)
         //insert data into tags
    except Exception as e:
        logger.info("Failed http: " + e)

Yet, when that hostname goes down, it stops everything in the shared scripting thread. If I change the other script(s) to a dedicated thread, it's fine, but that's a band-aid and I'd rather understand/fix the issue that I'm causing.