Tyranids remain unharmed by Warp Rifts

• 9th Ed Codex [Tyranid]:

"The Ordo Xenos have pieced together records that show splinter fleets swallowed by warp rents, only to emerge from other immaterean phenomena in entirely different regions of the galaxy. Should most races' craft be plunged through the warp like this they would likely emerge badly damaged or mutated, if they emerged at all. The hive ships appear unharmed by their experience, however, surging from the roiling tides of warp space as hungry and as deadly as ever. Worse, more than one such tendril has burst forth directly into the midst of a settled system."