I can provide some insights on how to isolate and fix this issue. I'd suggest logging out and logging in to your QuickBooks Online (QBO) account to refresh the system and for the changes to take effect.
If this is not the case, I propose accessing your account via a private or incognito window. This way, we can easily verify if this issue is caused by stored cache files.
The browser uses cache to swiftly load web pages faster the next time you visit. Too much of it causes issues that can affect the performance of your account. Using a private window helps us verify the issue as this doesn't store cache.
To open a private window, you can refer to these keyboard shortcuts:
Press keys: Ctrl + Shift + N (Google Chrome browser)
Press keys: Ctrl + Shift + P (Mozilla Firefox & Microsoft Edge browsers)