Regarding Tp-link and Samsung Android S10 update. I have a similar problem with my Tp-link model:Archer MR600.
After my Samsung S10 got the last upgrade no other devices are able to maintain an connection to the Tp-link. A few seconds after S10 disconnects from the network my other devices are getting connection again. I see you are only mentioning model AXxxx. It seems that my Arher MR600 have the same problem. The router reports it’s have the latest software available.
I hope you be looking in to this shortly?