I ran into this toying with L10 search syntax.
At https://support.logos.com/hc/en-us/articles/360030524831-What-are-Milestones-and-how-do-I-use-them- the examples give two different expressions but does not explain why they should be considered the same. I don't know if this is intentional (which seems to merit an explanation) or if one is in error. I cannot test them because now L10 crashes just as the results seem to appear. (More on that in another thread if I can't figure it out.)
One syntax is
milestone:"Bible John 3:16"
The other is
milestone:bible:"Jn 3:16"