I think I’ve seen that happening before, in that what I know I’ve seen happening before was a random desynchronisation between the WME map position and where WMEOD thought the map was positioned - if you’ve got the “Highlight by classification” option enabled then it’s obvious when it happens, because all of a sudden the highlights/polylines that WMEOD adds suddenly jump sideways so that they no longer align with the WME segments.
When this happens (and I don’t yet know why or how often it will), that seems to trigger a knock-on effect re being able to correctly select the road name, because now when you click on the segment to try selecting the name, the list of names shown in WMEOD is generated off of where it thinks the segment is, which is now no longer aligned with where it actually is, such that you might find the list suddenly emptying (if WMEOD now can’t find any potential matches at that location) or displaying names for roads somewhere off to the east or west (if the sideways jump happens to cause another roadname to end up aligned with this WME segment).
But as I’ve only seen it happening once or twice so far, and as I’ve had other more pressing things to deal with in other scripts, I’ve not assigned this one a high priority for attention - it’s on my radar, just not sure when I’ll get around to starting to look into it, or how long it might take to fix once I do.