INSTAGRAM simultaneous connections on my devices impossible

Hello, I have an instagram pro account. When I connect to my phone, I am instantly disconnected from my tablet, so on when I connect to my PC, I am immediately disconnected from my phone, and vice versa... basically, I connect without concern to my account, but impossible to leave it connected at the same time on my different devices and this is obviously not normal. (and very restrictive) .. of course I installed, uninstalled the app, changed the passwords, cleared the cache, in short the basics but nothing worked... any advice or ideas to help me? thank you so much.