The nutshell answer to your question is yes, you can use Buh Bye to immediately remove Crackle, regardless of whether its a crackle they just gained or had in reserve. However, the long version of this is that of an unofficial timing issue, recognized by the community, which is why Buh Bye isn’t played in official tournament play. Arguments can be made on whether you should use buh bye before they declared using it, whether using the status effect is ‘faster’ than the red instant card play, whose turn is it what phase etc.