Short story: I came from Wink and their app showed which automation executed at what time. I would use that when troubleshooting. The logs in HE are somewhat limited and also get recycled periodically. In order to maintain a history and be able to go back to check, I use Node-red (https://nodered.org) to capture data from HE and log it in a database. The "virtual" switch (naming convention of "Virtual"+Automation name) allows me to log it as an "automation". (Eg: Virtual switch = On, Automation started, Virtual switch=Off, Automation ended)
Long story: Here is a link to the details of how I did this (Device event list like Wink had - #8 by rakeshg). Hope this helps.
