Hello! We have an update to share on this issue and more generally on upcoming fixes in future patches.
We’ve been working to address a large list of issues across all areas of the game in our upcoming Wastelanders update, including many of the community’s most-requested bug fixes, like the +250 DR legendary effect issue.
Right now, we’re looking to pull some of these community reported bugs, including this one, into an earlier patch. However, we need to be sure we can do this safely, without creating new issues where there weren’t any before. We know this one is a priority for the community, and we’ll share more firm details with you on timing as soon as that's locked in.