Zakarum remnants have stopped accumulating

I’ve accumulated 1046 Zararum remnants and the total has frozen. I cannot seem to increase that total. I suspect it might be related to using a seething opal some time in the last 2 weeks. I notice that using an opal stops the accumulating of remnants but I think that it is supposed to reset the stop action when you exit the area you are in? What happens if you are in the open world when you use an opal?
Thanks