I'm 7 months post-ablation and occasionally get a little jump. the good thing is the accessory pathway cannot support conduction, and the SVT drops out after a couple of beats.Like many of us, it's very possible that the triggering mechanism still exists, but there's little or nothing there to support it.
I don't think this is any cause for concern, but it may ease your mind to discuss this symptom with your cardiologist or EP.
I'm two months post-ablation and have gotten the same symptoms. They fizzled out after a few seconds and I'm fine afterwards.
I don't know what type of SVT you had, some types can be more complicated to ablate than others, but my EP told me the success rate for SVT RF ablation is 95%.
Hope this helps.