Hi Luvo,
I know how it feels when you're kicked out while working on a certain task. Let's check to see why this happens to your QuickBooks.
First, I'd like to point out that QuickBooks will automatically sign you out based on the set timeframe in your settings.

Second, you may need to clear your cached files. They speed up your browsing activities but could cause unusual behaviors. We can do the basic browser troubleshooting steps to see if they are causing this beahavior.
To start, you'll want to sign in to QuickBooks using a private browser. This step disables its extensions and stops the cache from saving your browsing history.
- Google Chrome: Ctrl + Shift + N
- MS Edge and Firefox: Ctrl + Shift + P
- Safari: Command + Shift + N
If you won't get kicked out again, you can clear the clear its cache of your browser. If it's the same thing, please try other browsers.
Moving forward, you can monitor your browser's health using this link: https://fixit.intuit.com/.
Feel free to share an update after doing the steps above.