@bartvincke 

Exact same issue here.  X60 units will drop WiFi and reboot many times a day.  Light goes from green to yellow to red then back to green.  Then I get a notification the malware database was updated.

This is the SECOND set of X60s - we sent the first set back thinking it was a HW issue but the second set is doing the same thing.  Unless there is a 'fix' they too will go back to Costco.

Ours are running in Router mode and I have confirmed that there is no internet outage at the cable modem during these reboots.

Any hope?

@bartvincke what I managed to find so far is that the issue occurs when my surface pro 4 is used.

all drivers and firmware up to date.

I suspect the deco and the marvel avastar nic don't like each other.

in any case, a full wifi crash (all ap's)  due to a single device connecting should never happen so I do expect Tp-link to look into this matter and provide a stability fix in the firmware.

@bartvincke Me as well.  There is no event that I can pinpoint that causes the reboot either.  Typically once a day at a random time throughout the day.  (Yesterday at 7:20 am, today at 3:20 pm) For what it's worth, I do not have a Surface Pro.  The ISP's modem is fine during these reboots.  My computer hardwired into the modem continues to operate normally during these "outages."

@bartvincke I spoke with "support" through their chat feature.  The agent told me that this is due to the security database update.  In order to apply the security database update, the units need to go offline, and there is no option to schedule the push.  He told me to "be patient."  Apparently randomly going offline is acceptable to TP-Link.  He also said that turning off the security feature will not fix this.  "Notification in advance" or "scheduling security updates" is not in upcoming firmware updates.  This is a showstopper for me.

@imikem Wow, if what they told you is accurate that would be a deal-breaker for just about anyone. 

We are sending back our second set of X60s back to COSTCO as they continue to reboot 'at random' that that is simply not something we can live with having two adults on conference calls and WebEx meetings all day and two teenagers on school meetings and playing games.  Crazy.  

I have been working with tech support for the past 24 hours. 

1) TP-Link knows of an issue with the Deco line and Surface Pros.  They asked me to install this beta firmware, but because I don't have any Surface Pros, I'm not installing it.  https://static.tp-link.com/2020/202005/20200527/Deco_X60_1.2.3_Beta.zip

2) The other thing is to disable all 3 of the Antivirus options.  That includes Malicious Content Filter, Intrusion Prevention System, and Infected Device Quarantine.  I did this yesterday, and my devices have NOT rebooted randomly since.

I'm hoping one of these options can help other community users.  #2 helped me so far. 

Well that was short lived.  A few days of zero problems, and then today the units have rebooted 3 times.

I upgraded to the latest release firmware of 1.2.4 Build 20200527 Rel. 42769.  I do NOT have any Surface Pros.  There is something systematically wrong with this hardware.

IPTV/VLAN- Disabled

MAC Clone - Disabled

TP-LINK DDNS - Disabled

SIP ALG - Disabled

Fast Roaming - Disabled

Operating Mode - Router

Malicious Content Filter - Off

Intrusion Prevention System - Off

Infected Device Quarantine - Off

@bartvincke in my case the situation appears to have changed after the latest firmware update last week.

This one included a surface pro fix ( which I use ) so I had high hopes

( So far ) it no longer crashes the whole mesh but twice now during the last week the Deco I'm connected at suddenly cuts out, starts blinking red and importantly does not recover anymore.

This is different then before where all deco's used to go down , now only the connected one, and before it was a restart, all deco's recovered without me unplugging or using the reset button, which is something now I do need to do with that one deco device.

The devices however are less impacted as they unnoticeable roam to another deco and continue working.