Appears to be an error in dialplan, better you do make a sip debug to have certain that the other side is not denying/drop your invite request.
sofia/internal/1000@10.1.10.18:5060 [RFC2822_DATE]=[Mon, 04 Nov 2019 11:17:04 -0500]
33f89d76-9415-48c5-8e59-1eb219db5b90 EXECUTE [depth=0]...