An interesting aspect of collective agreement on a heretical belief is that both Catholics and Protestants agree on the anathemas pronounced against any teaching that said the Logos, Son of God, or Second Person of the Trinity had a starting point in time - was created, in other words. This goes way back to the Creed of Nicaea in A.D. 325 and continues to this day. Please note that the Council produced "the Creed of Nicaea" to distinguish it from "the Nicene Creed". The Creed of Nicaea contains the anathemas (curses) which identify what the heresy in question was, precisely:
"And those who say: 'There was a time when he [the only-begotten Son
of God] was not', and: 'Before he was begotten he was not', and: 'He
came into being from nothing', or those who pretend that the Son of
God is 'Of another substance (hypostasis), or essence (ousia) [than
the Father] or 'created' or 'alterable' or 'mutable', the catholic and
apostolic church places under a curse." The History of Christianity,
p. 159, Lion, 1977
That anathema against that particular heresy was produced 1700 years before the Protestant Reformation really got going, but right from its start, it had no quarrel with this Creed of Nicaea, so we have both Catholics and Protestants in agreement with that declaration of heresy, with no need for Protestants to reinvent the wheel by producing their own declaration.
Since the 1800s however, denominations have arisen that have disagreed with that, absorbing some, if not all, of the heresies on that topic from way back. There is even one group that denies being either Catholic or Protestant and which calls all religions other than itself satanic heresy. Only that small denomination thinks that. No others do. That would be to go off at a tangent, though.
It might be worth adding that there are also modern-day variations on the heresy of Pelagianism, yet not only Catholics continue to call it a heresy. It's just that modern-day 'waters' have become quite muddied as a few denominations imbibe some of those ancient heresies. In the main, however, there is a broad spectrum of agreement across the main Christian groups as to Pelagian (or similar) doctrines being heretical.