I did not scan the ship but there were no missile warning sounds, no missiles/mines on the radar, and a torp would not have been able to catch that build while boosting away. The shots that missed and went by me were PA and frag, with the green cosmetic applied. Makes no sense to me. If it was not a glitch, exploit, or cheat, it had to have been some sort of lag situation where they were able to shoot at me for a while before damage registered on my end.
I tried myself gank such (well shielded) cutters, and unless they made really big mistakes, they usualy able being to leave at will.
I can assure you that is not possible for single cmdr, even with max dmg + premium bulid frag bulid(in p2), to stop such cutter from wake, if such cutter did submit, then proceed to high wake right away after being interdicted, when did all of it, in right order. Wich you did... Unless you actually lost interdiction, but I belive you would said so, if did.
Think about it, you said being able evade gankers for years, so I bet you saw quite many, during your times... but this one felt diffrent right? I bet you where attacked by frag + PA bulids before, but they where not be quite like "strong" as this one. Because they cant, unless cheated, as there no "exploits" or bugs related with frags or PA. One can premium thier bulid, for extra 30% dmg, but that alone isnt enough to kill such cutter, in such short amount of time. Been and tried that, so I know.
The transition from frame shift to normal space after the interdiction did appear to take much longer than normal though, so....
I dunno....
If there is "delay" in drop transition, there will be some lag. But... it really does not matter if there is lag or not.
Legit cmdr, even if that ganker would be most skilled killer of all cmdrs, you should still be able to leave at will. Neither, single cmdr, cant dish this much dmg, to actually outdps waking cutter, with such shields, and thier hull, neverless. This require firepower of a wing. Donno for others, but for me, sounds like typical dps cheater encounter.