Bug, Since the latest update, the R10 is randomly going into sleep mode even while actively being used. Suggestion, do not send shot data onto simulator software if it is not complete...

Can you try calibrating your R10 using the steps on the support page I linked above? Let me know if issues persist.

Same thing with my unit.  On the latest firmware, shots read great, I'm calibrated and out of nowhere, the R10 will start falling asleep multiple times in the course of a few minutes.  Nothing in the environment changes and I am set up according to Garmin spec with the device calibrated. It will go for 20-30 minutes and not go to sleep once and then go to sleep between multiple shots in a row.  This definitely feels like a bug of some sort.

Same here on firmware 4.20 :(

Having the same problem as described here. Is there a fix yet?

Happens to me on garmin range but gspro and awesome golf doesn't have the same random sleep issues

Not sure if this helps anyone, but today when playing HTH, the unit suddenly went into standby all the time.

The issue was that the unit had switched bluetooth connection from my tab to my phone.

No warning on the tablet, and no asking for wake up the unit, so maybe not related.

I'm still on 4.0, and problem was easily solved by turning off bluetooth on my phone, after which the unit reconnected to my tablet after wake up press on the back.

Same here. Got this at least 10 times today and no Garmin Rob all your suggestions don't help. It's clearly a software bug with 4.20. Never had this issue prior to updating to 4.2. 

Same here. Got this at least 10 times today and no Garmin Rob all your suggestions don't help. It's clearly a software bug with 4.20. Never had this issue prior to updating to 4.2.