R1150GS dies 20 seconds after startup

[Pedro Rocha]

Hello,

My bike is a R1150GS and has developed a weird behaviour over the last few days.

I ran it almost dry, and decided to fill up with 98 octane fuel to see if I felt any difference, out of curiosity.

Right after filling up, it died about 20 seconds after I started it, while the bike was already slightly warm and already moving on to second gear.

Since then, whenever I start the engine (already warm after a lunch break or cold) it dies about 15 to 30 seconds after. (Usually while I´m still not moving but the iddle is normal right up until it dies) After it dies and I take no action I can hear the fuel pump priming itself just like I have just switched the bike off and back on myself.
A few seconds later, it will start just fine and run as normal. While if I try to restart it immediately after it dies it will not start.
I feel no loss of power or smoothness whatsoever.

I still have only done about 150km on this tank, but the fuel is from a reputable good fuel station and brand.

I have the feeling it might be something electrical since it runs as normal. Can anyone help me figure this out?