When a "Repeat Command Phrase" is used with a prefix/suffix command, the cached version used for this is unaffected by changes to the actual command until that command is executed again(by voice, which is the only option for prefix/suffix).
I.E. if the command is changed or even deleted entirely, using a "Repeat Command Phrase" will execute the version of the command last executed using its own command phrase.
At one point this happened with a regular command as well, but I can't replicate it.
EDIT: Fixed in v1.7.2.11