Yes. Afaict you’ve found a bug, report that and see if we’ve missed anything, but when you use the level encoder whilst grid recording it allows you to set bogus sound locks with no warning whatsoever. There are only viable options when realtime recording, so the useless parts of the pool are hidden, but there’s no !, let alone a flashing ! and no indication that the process has failed except by auditioning that the track sound is still playing - a warning reminder that a sound is not valid on a track would be appreciated (as per the written manual) - good catch 
report to support (and link this topic to the bugs thread) and advise us