What if you click the "pending X sats" ( with refresh symbol)? It will show if this ecash value is still pending (not spent or at least not received)

Most likely possibility: did you (by accident) create an ecash-token of 15000 (e)sats? If thats the case you can click the outgoing '15000 Ecash' under 'History', it will open a popup with QR, (the ecash-token) click 'copy' to copy a cashu textstring, and 'close' to close the popup.

Then click 'receive' in mainscreen and paste the cashu textstring into the textbox and click 'receive' to redeem the token in your own wallet