I did a search before creating this post with no results, but after posting this, a few posts popped up in the related menu. This answers my question:

https://community.tp-link.com/us/home/forum/topic/92148

Unless anyone has anything to add on the newer KS-100 (HS-105 was renamed to KS-100 to match the new Kasa app)

@AJR 

Nothing to add, the post you referenced answers it.

@AJR 

If you want a device to stay on ALL the time, like a freezer, .......WHY plug it into a switch?

@AJR 

We live in an area where there are several brief power outages each year. After every power failure most of my TP-Link devices go to "Local only", but over the course of a few  inured, hours and days, most come back on line. but this isn't good enough. 
The easiest ones to "fix" are the plugs - simply remove and plug them back in. They reset. 
The ones that cause the most problem (no reset after 48 hours) are two HS200 switches. We installed these switches because we have some art work that cover many of the light switches in the house. The "fix" seems to be to manually reset the switch by pressing the button, under the switch, on the lower right. The switch shows an orange light, then resets after a short few minutes. 
I have no idea why this works, but it does. The key seems to be to reset the device manually. Unfortunately this is not an ideal solution but it works. The same logic should also apply to other devices such as bulbs and wall sockets. Either wait, disconnect from power (remove bulbs etc) or press reset button.