This is how REV reverb was designed: we didn’t want to limit the ranges so it’s all “sweet spot”, but instead allow you to get into strange territory if you need to… With maximum Time = 100, and changing Diffusion or Size from 100 down towards 0, reverb results in extremely long and very noisy tails which can overwhelm the output completely. To get out of this state, all you need to do is lower the Time to at least 99 which should bring back stable audio output. Warp reverb model is especially designed to go into such extremes.
Similar is true for DEL delay Feedback which goes up to 150% and can produce wild sounds.