Thanks for joining the thread and following the recommended steps provided above, @PapaP.

Since you're still getting the same result after performing the basic troubleshooting steps, I'd suggest reaching out to our QuickBooks Phone Support Team. This way, they can check your account and help verify the cause of this unexpected behavior. 

Here's how you can reach out to them:

1. Click the Help menu in the upper-right hand corner.
2. Type in "Talk to a human", then press Enter.
3. Look for I still need a human and click on it.
4. Select Get help from a human or Contact Support Team.
5. Choose between Send a message, Schedule an appointment, or Get a callback.

Please check out our support hours to ensure that we address your concerns on time.

I've also included this article as an additional reference about the frequently asked questions in regards to the use of multi-currency in QuickBooks Online: Multi-currency FAQ.

If there's anything else you need, you're always welcome here in the Community to post again. I'll be always around ready to help. Stay well and have a great weekend.