This is a common problem. Only workarounds exists is not using form_* functions for subsequent fields.

Wanted to solve this by doing

{{ form_row(form.save) }}
{% do form.save.setRendered(false) %}
{{ form_row(form.save) }}

quickly found setRendered does not accept arguments and PRs for multiple different use cases has been rejected¹ in² past³. Is this use case good enough for this change now?

This is specifically very useful to split form visually to two, where one block is just for RepeatedType and SubmitType. Here was the requirement from our designer

If I could render same field twice, I could reuse same button field and be done with it.