The experience ethereum are passing through for over three months now, on high fee's charge, which is the course of the upgrade of ethereum in Blockchain, currently the fees are gradually reducing, which in a future time, ether fee's will be stable.
Yes, as we have seen in the past, the transaction fees of the ETH platform tend to be stable, but since there are currently ongoing developments, the transaction fees of the ETH platform often change within seconds, making their users a little difficult in setting up transaction fees and even some of their users often complain about this.