I missed that since Wednesday there is a new SJC-version (210224). With this version the (321) NAT indicator came back for me. Might bring back your former NAT indicator too.
This version works very well, can use a network buffer of 128 now (with some artifacts, but not too often), even 64 if my machine would be faster.
Try with this new version and in general, if something doesn’t work as expected, have look at the download page if there is a newer version available and if not, download anyway, it might have been updated with minor corrections. At least worth a try.