[Rspamd-Users] DKIM oversign headers duplicated?

[Tom]

I am using the rspamd DKIM signing module. With it, I am signing with
two keys. an RSA and an Ed25519 key. The dkim headers rspamd is
attaching to emails appears to duplicate the elements in the h= tag as
follows:

DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nuegia.net;
s=mail2; t=1622831171;
	h=from:from:reply-to:subject:subject:date:date:message-id:message-id:
	 to:to:cc:mime-version:mime-version:content-type:content-type:
	 content-transfer-encoding:content-transfer-encoding;
	bh=g3zLYH4xKxcPrHOD18z9YfpQcnk/GaJedfustWU5uGs=;
	b=bUjVCA0KwQOvC5uxgclGIHVSXkAxd1V6vQjmT9fLQRVgLs/Kry3Xn1/+5HS+9imik+jfu6
	3MlLJnhy3Nc25b8ekW7GC8/29ecDSiF8pIHv0xYZfzdQeXkSIaiZQTy8d2SP5OKwxg+saE
	+D7sE/mAiDffwpAS8V+eu3yYwS8mxOc=
DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=nuegia.net;
	s=mail2-edward; t=1622831171;
	h=from:from:reply-to:subject:subject:date:date:message-id:message-id:
	 to:to:cc:mime-version:mime-version:content-type:content-type:
	 content-transfer-encoding:content-transfer-encoding;
	bh=g3zLYH4xKxcPrHOD18z9YfpQcnk/GaJedfustWU5uGs=;
	b=pGo7uzFm902KdUkKOjlqPMwhvChJbFr/swVKg4qO9UNS9FafyO1k0g6je5WxV51vTpdYst
	t7vhA1YU/iiajmCQ==

and in this email. There are two 'to' headers, subject, date,
message-id, mime-version, content-type, and content-transfer encoding
oversigns specified. 

Is this normal or is this a bug in rspamd? Could this have an effect on
email deliver-ability?