Hello Darcion.
Was the fireplace still on fire? Please test this upon extinguishing the fire in the fireplace and report back if the issue is still present.
Regards,
Geez

i think wooden sticks was the same problem, i cannot remember but i will test next time.

ok, works as intended, after the fire is off I can detach the stones.

Hello Darcion.
In that case I am closing the ticket, but feel free to submit another in case you encounter any issues.
Regards,
Geez