While scouting out the terrain surrounding the wreckage along with R2-D2, R8-B7 was cornered and attacked by two of the planet's native gundarks. R2-D2 attempted to save the hapless R8-B7 but was knocked out of the fray. Following R8-B7's destruction, R2-D2 flew Windu's Delta-7B offworld to inform the Jedi Council of Skywalker and Windu's situation on Vanqor.
Because R8-B7 is named as an R8-series astromech droid, which were first manufactured in the late stages of the Galactic Civil War, this sets up a canonical ambiguity identical to that raised by the units R7-A7 and R7-D4.
Alternately, Pablo Hidalgo's revelation that droid names are fragments of longer designations could also provide an explanation for this apparent lack of continuity.[2]