It could be that the system still recognizes the rule that you created. If you're no longer using the rules in QBSE, I recommend deleting them. This way, the system will not identify the rule and prevent it from categorizing your transactions automatically.
Go to the Gear icon at the top.
Select on Rules.
Look for the rule you need to remove.
Click the Edit drop-down.
Hit on Delete.
If deleting the rule doesn't make a difference, let's try clearing your browser's cache. This will allow QBSE to load a fresh copy of your data. Web-based applications like QuickBooks Self- Employed collects cache files to speed up your browsing. However, they can often become corrupted and can be the reason that your transactions are still categorized.