Without limitation of any right or defense of an insurer otherwise, none of the following acts by or on behalf of an insurer shall be deemed to constitute a waiver of any provision of a policy or of any defense of the insurer thereunder:
(1) acknowledgment of the receipt of notice of loss or claim under the policy;
(2) furnishing forms for reporting a loss or claim, for giving information relative thereto, or for making proof of loss, or receiving or acknowledging receipt of any such forms or proofs completed or uncompleted; or
(3) investigating any loss or claim under any policy or engaging in negotiations looking toward a possible settlement of any such loss or claim.