Hi Jconn,
If the fix is introduced in Junos version 18.2R3-S3 it will be ported to the subsequent releases. It seems like you are already on 18.2R3-S4 which should contain the fix but it isn't. I think it is a Regression issue.
As fellow community members said, try to upgrade the Junos to 18.4R3 and check the behaviour.
BTW, the Juniper Software Download page contains the 18.2R3-S3. PFB, the snippet of the version from the download page.
![junos.PNG junos.PNG](https://higherlogicdownload.s3.amazonaws.com/JUNIPER/MigratedInlineFiles/1794f2f29716430386912aee0fb2dc31_3105975119324db6a55c23e54414a21b)