My ISP resets my IP each 24 hours exactly (as the "fixed IP" is the option they offer for additional fee to allow running web server or streaming). Could your ISP do the same?

One possible culprit is if the OS starts some daily housekeeping task that ties up computer resources, especially the internet connection. I've recently taken to pausing Windows Update before I start gaming, after an incident similar to yours-- although in my case I was soloing a dungeon, and was still able to grab my tickets and golden coffer by doing a fast solo run of nFG1 after I got my connection back. I don't know why another program or service should cause an actual loss of WiFi connectivity (which is what was happening to me), but the event logs and troubleshooter typically said it was related to the DNS. The only reason I suspect it might have been Windows Update in my case was because when I was looking at everything while trying to reconnect to my WiFi network and stay connected (it would reconnect but then disconnect right away as soon as apps like the Weather widget on the Task Bar tried to access Location services), I happened to glance at the Windows Update screen and it said it had last checked for updates X number of minutes earlier, which coincided exactly with the time of initial dusconnect during my dungeon run.

Oh my I swear this drives me nuts. I try to complete 1 BG (maybe more if this game allows such things) but every time I crash before the game ends. Leaving my tea m mates to fight. Not getting the rewards. Come on ZOS time to fix your game, right??

You say your connection is solid, but is it wired or wifi? It's always advisable to avoid wifi with gaming, especially if you have connectivity issues, as it doesn't always produce a consistent signal strength depending on what else the connection is being used for, and that can cause you to be kicked.

https://weakwifisolutions.com/wired-vs-wifi-for-gaming-which-is-better/

Similar happening to me just not via lag but when I log out from a character half of the times I end up on the login screen instead of the character selection screen.

I'm also getting frequent crashes and log-outs. Usually it's a severe lag spike followed by a game crash. Started happening after Deadlands patch dropped.