5.5.25 fixes it for me (DS CPU version). The only issue I'm still observing is the yellow motion overlay is not added for analysis for the second sample (T-76msec) however object detection is processed as expected
@Dave Lonsdale You may have seen it already but some useful information in relation to main- & substream motion detection & deepstack analysis in this thread:
https://blueirissoftware.com/forum/viewtopic.php?f=16&t=2535
I had the same issue. Ken suggested using the substream for DS. Camera Properties > Trigger > Artificial Intelligence > Unselect "Üse main stream if available". Resolved the issue in my case....