Windows + Android connections

Hello!

I've been having some issues with my Teamviewer recently. I want to connect many devices together using a Windows 10 tablet as a host. The other devices are: three Android tablets and one Windows 7 laptop.

But there are some problems with this setup:

1. Using a router to set up a network, it works only on Windows machines and maybe one Android tablet will connect from time to time.

2. I tried switching to a smartphone with a hotspot and it works much better. Two Windows devices connect without a problem, and one Android tablet. But the other two either disconnect every two minutes or not connect at all.

3. The weird thing is that it sometimes work flawlessly, just to crash the next day.

I have tried many things, the apps and systems are updated. I'm using free versions of Teamviewer, as it is just my personal setup at home. I will be more than grateful for any possible reasons and solutions.