I can confirm that a fifth level Eldritch Blast targeting two separate creatures/objects results in the same bug. Like some here have noted, multi-target spells seem to work correctly at times and incorrectly at others, though in my experience the incorrect behavior happens much more frequently. I've tried to pin down a common link between the times that the spell(s) work as intended, but so far I haven't had any luck. For what it's worth, I get the sense that the incorrect behavior happens more often with spells that have some additional effect, such as creating a surface or knocking a creature back (as in Repelling Blast), but that might just be because I've focused my attention on such spells in trying to deduce the source of the bug. The search continues~
I’m also struggling to find a pattern. Multiple target spells seemed to fail every time until I tried the tip in this thread and targeted the character portraits rather than the sprites. That seems to work correctly every time, and after I’d done that once I did still have a problem when targeting the sprites with Gale’s magic missile, but Wyll’s level 5 double eldritch blast (which is also repelling) hasn’t shown the problem at all.
As you say, the search continues …
