Welcome! This forum has a treasure trove of great info – Scouters helping Scouters! Just a heads up, though - all content, information, and opinions shared on this forum are those of the author, not the BSA.
There was a post this morning that all positions in SB+ were supposed to have converted from “named” DL and “named” ADL to “plain” DL or ADL, respectively. Have you forced a refresh in SB+ to reload the latest code? That conversion may have fixed your issue.