OctoSlack causing layer shifts

[GaryBoone]

I've been suffering from layer shifts in my prints. After checking belt tensions and checking for other mechanical issues, I suspected plugins might be the cause. I did a search by enabling/disabling plugins and narrowed the primary suspect to OctoSlack. Here's the data:

Plugin	Run1	Run2	Run3	Run4	Run5	Run6	Run7	Run8	Run10	Run11
DryRun Plugin (1.2.0)	enable	disable	disable	disable	enable	enable	enable	enable	disable	disable
Firmware Updater (1.12.0)	enable	disable	disable	disable	enable	enable	enable	enable	disable	disable
Octoslack (2.2.0)	enable	enable	enable	disable	disable	disable	disable	enable	enable	enable
Preheat Button (0.8.0)	enable	disable	disable	disable	enable	enable	enable	enable	disable	disable
PrintTimeGenius Plugin (2.2.8)	disable	disable	disable	disable	enable	enable	enable	enable	disable	disable
Prusa ETA override Plugin (0.1.1)	disable	disable	disable	disable	enable	enable	enable	enable	disable	disable
Resource Monitor (0.3.5)	disable	disable	disable	disable	enable	enable	enable	enable	disable	disable
Slicer Thumbnails (1.0.0)	enable	enable	disable	disable	enable	enable	enable	enable	disable	disable
Tab Order (0.5.12)	enable	enable	disable	disable	enable	enable	enable	enable	disable	disable
TemperatureFailsafe (0.2.3)	enable	enable	disable	disable	enable	enable	enable	enable	disable	disable
LAYER SHIFT OCCURRED	yes	yes	yes	no	no	no	no	no	no	yes
				>25hrs	~19hrs		~17hrs			>25hrs

The data appears to implicate OctoSlack, but of course it's not conclusive. It could just be a rare problem and I'm often running with OctoSlack enabled.

I have enabled logging for OctoSlack, but it appears that logging only covers maybe 3 hours. So I'm not sure if the logging I have covers the most recent layer shift. Also the log is long and contains private info like names and tokens. So let's narrow down what we're looking for in the logs and I'll scrub a relevant portion to post.