Yes, you can fix the data connection issues between QuickBooks and Square without disconnecting the app, debbloon. Let me mention them below.
Before anything else, let's check for any ongoing issues with Square, as QuickBooks relies on the data they send.
To begin with, let's log in to your Square app and check if there's system maintenance or possible notifications that need attention.
However, if there are no issues with Square's end after checking, I'd recommend contacting Square support. They have the necessary tools to troubleshoot what causes the problem or investigate further.
Once the data connection returns, let's review the downloaded transactions from Square and match them with your QuickBooks records to ensure financial accuracy.
Feel free to return to this thread if you need clarification on why Square transactions stopped from coming into QuickBooks. I've got your back.