Fixed. Thx. Fortunately my iPad still works since I didn’t update to the latest ST mobile app.
It’s not me 
Updated to 0a0 - moved logs to each piston, the logging level is no longer in the Smart App. Each piston gets its own, thinking of having it so that once logs enabled, it reverts to None in 24h - there is no need to put extra stress on the platform logging stuff when it’s really NOT needed.
Also added an (untested) kill switch in the parent app - pistons will simply abort if enabled.
So I have a recommendation based on findings with the ST team. I recommend that the number of selected devices in a single webCoRE instance does not exceed 50.
At 81 devices, the start time for the piston is around 300-500ms. At 127, it goes up to 1500-2000ms.
So breaking them down by area of expertise (ie lights control in one instance, music control in another, etc) may improve performance.
Also, don’t just select all devices because you can, try and select those you need only.
I will provide a way to identify devices that are selected but not used.
I believe I took some measures for that to stop happening in 09f but you haven’t yet upgraded. Try that and let me know please. I believe the problem is with devices that use HTTP to poll/refresh (like the Harmony). Eventually those HTTP requests time out, causing the piston to end unexpectedly, before getting the chance to resubscribe to time events.
You can see from your logs that the last Poll took 10s. The author of the DTH should implement async HTTP requests - ST has support for that now.
Interesting. Tagging @tobycth3.
@ady624 Need some help here, I just updated an hour ago and now not a single piston is firing. Here is from ST logs. Every one of my pistons looks like this, is this something I did, please help! Webcore does not show any logs since the update.
Update to 0a1 please, then visit the smart app’s settings, toggle the kill switch on and off then save. Looks like input type “boolean” returns a string, not a boolean… my mistake, sowwy
What kill switch, are you talking about the disable all pistons?
It’s in the webCoRE smart app settings.
I don’t see a kill switch all I see is disable all pistons, is that what you are talking about?
Hi ady624,
Did the Integrations get removed for other services like IFTTT on the SmartApp? I don’t see this option anymore on the settings menu since yesterday.
Thank you, everything is working again. Much appreciated.
@ady624 Sorry to bother you, but did logging change. I don’t have logs anymore other than what I have being logged to consol and when I go to the app, the logging settings are not there anymore.
Yes, that’s it. Disabling them all is a kill switch.
Any idea on my post directly above, I got no logs and the logging setting is missing.
Yes, he changed the logs to disable after 24h IIRC and moved the the log setting to the WebCoRE dashboard where you will find it, it’s off by default, at least it is for me
Rick
Are you referring to the Trace switch? I cannot find any other settings for logs, everything was working fine until 2 hours ago. Got a screen shot?
Logging is on a per piston basis now … scroll further down, under the Log box.