Did you have an anger outburst that was obvious to others in these situations?
If not, then it is not a meltdown.
It seems like getting really angry, but you seem to be able to control your behaviors and not have public outbursts that could damage your relationships with others.
The main problem that I can see with these episodes is if they happen really often, but you said they haven't happened in a year.
If you find these to be a big problem in your life, it might be helpful to look into emotional regulation, in your case perhaps trying to not get really angry from triggers, it is possible to regulate yourself to be more zen about triggers, you may find that you don't get angry over things that you used to get angry over.
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Drain and plane and grain and blain your brain, and then again,
Propane and butane out of the gas main, your blain shall sustain!