Here is the FR24 plot:
https://www.flightradar24.com/data/f...su270/#d3c81af
And the FlightAware plot:
https://flightaware.com/live/flight/.../VTBS/tracklog
On the track logs from both sources an event is visible at about 2355Z. The plane is about to cross the coast of Burma at FL350.
A first glance at the FR24 data shows the altitude climb by about 700 feet and then return to FL350. Groundspeed drops to 492 knots and rises to 522 knots. Vertical speed fluctuates between 1300 fpm down and 2000 up. The event seems to last perhaps two minutes before things stabilize prior to starting down for landing. Usual disclaimers about hobbyist ADS-B data apply.
The closest A380 I see is EK374 DXB-BKK at FL 390. But it's about 150 miles ahead and its track to BKK is well to the west of SU270's position.