Good day all

I'm hoping to get an opinion or advice if at all possible on a problem i am experiencing at the moment.

Stated a little while ago where the car suddenly loses power and has a jerking motion when trying to accelerate then the lights come on. Keep driving and the problem would stop and the lights will turn off. I took the car in and had the spark plugs replaced and this seemed to sort out the problem. It has now restarted doing the same and a bit more intense than usual. I had to fill up with 93 the other day and it all restarted right after this. It comes and it goes, but it is quite frustrating and stressful losing power suddenly on busy roads.

Has anybody experienced the same or could possibly give me a diagnosis on the possible causes.