Since this does not seem to have been answered;
"This system did not work with all beings: Beings whose bodies or minds were destroyed beyond repair, or not composed of Protodermis, such as the Makuta, could not be revived on the Red Star." - Bs01, Red Star#Features
Basically, you can't be revived if you're electrocuted or something similar because your brain is fried, and you can't be revived if the body is destroyed by disintegration, acid, explosions or anything similar, since that would too destroy the mind.
As for being disrupted or blocked, we know that you do not get revived if you are outside the range of the Red Star, as was the case with the Matoran known as Reysa. The same thing would likely happen if it was somehow blocked. Since we don't know how the Red Star detects dead bodies, we don't really know if it only teleports recently killed invidivuals, or if it teleports any dead body which is in range.