@Klowe2112 

I'm having the same problem except for one HS110 plug.  My HS105 plugs, HS220 dimmer switches, and all of the TP-Link bulbs go offline frequently.  Only the HS110 plug has been reliable.  It will remain on when everything else has gone offline.  Have no idea what is causing the problem.

I am using four Velop WHW03V2 units.  They were purchased in January 2019.

My computer devices are having no issues with the wifi. 

TWB

Can anyone confirm that a Linksys Velop Firmware version later than 1.1.9.195026   has support for Kasa Smart switches. 

I've read other forums that 2.4ghz support for smart devices is improved in recent versions, but can't find anything about the issues mentioned in this thread  being resolved. 

Current Linksys V1 Firmware version
Ver. 1.1.18.206964
Latest Date:  7/12/2021

I can confirm that I upgraded from 1.1.9 to 1.1.18.206964 on a 4 node Linksys Velop WHW03Bv1 network and the 30 TP-Link devices still seem to be staying connected.

I'll update this thread if they become unstable again.

I did call Linksys prior to upgrading and they didn't really understand what I was asking. From reading the release notes there seems to be several changes from 1.1.9 to 1.1.18 so am hopeful. The issue was when they added the linksys aware feature in 1.1.10 it had some issues with the TP-Link devices.

https://downloads.linksys.com/support/assets/releasenotes/WHW03_A03_Velop_Customer_Release_Notes_1.1.18.206964.txt