Appeared to be extension of airplane wing until it flew away.

I know this is a very vague account but I know what I saw and felt it was important to log it somewhere incase anyone is collecting data.
Time is approximate based off of photos I’ve taken of the airplane wing in the night sky.
Staring out of the airplane window 3 lights parallel with the end of the plane wing, moving at exactly the same speed, staring out the window because of the setting sun/low light they looked like they were an extension of the wing, didn’t think anything of it.
Staring out the airplane window at the end of the wing looking out into the sky absentmindedly these three lights soldly there, then suddenly they detached and zipped away at a different speed to the airplane wing in an almost straight line (almost like if you were swiping off of an iPad) in the opposite direction that the plane was going.
This was sighted on Malindo Air OD205 flight kulalumpar departing 17.55 to New Delhi arrival 20.26
The bit I found especially strange was whatever it was was moving in unison totally parallel with the end of the wing so much that it looked like an extension of the wing. It wasn’t until it zipped away that it looked further in the distance.
I think I was staring at the lights specifically for maybe 3-5 minutes? Aware I could be hallucinating but… anyway didn’t feel like it
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