I never had the problem. With that said I don’t won’t to diminish what is going on. This is just a suggestion, I let the clutch out slow till it starts to grab, as it grabs I give it throttle to counter the stall. No throttle stuff prior. Seems to work. On flat or down hill road you should be able to let the clutch out slowly enough not to stall with no throttle at all. Well that is to say I can. Your bike may be different. I hope you get it figured out. Guess what I am saying try a different technique.
When I rode a friends bmw boxer I had a lot of trouble shifting. Things wouuld just get jammed up and could not make the shift. He explained on bmws you had to preload the foot shifter with upper pressure just befor the actual shift. After that it shifted fine. A little learning curve but it was fine. Every girl has her charm you just need to learn how to dance with her.
On delivery of my S10, I noted jerky throttle response, a rough idle and occasional stalling. The motor was very tight and with the light flywheel effect of the engine, it stalled very easily when there was a slight hiccup in the fueling. My right TB was at 1/4 turn out on delivery so the first thing I did was read the forum and try it at 3/4 turn out and balance the left TB; better but didn't fix the problem. By the time I had one thousand miles on the machine, I was sick of the obviously lean fuel symptoms and was looking for a cure. Nothing more fun that dealing with a top heavy 600 pound machine that stalls with no warning. I considered having my ECU flashed but that requires a very competent turner. I saw someone mention the Booster Plug on the forum and ordered it.
Simple install and wow, way better. Less jerky, smoother, consistent idle, and no more stalling issues. I've added a Akropovic slip on and now with 6,000 miles on the machine, the bike is a rocket. I ride much of the time in the touring mod and it is not dead like it was when I first took delivery of the motorcycle. In the S mode the bike is lots of fun.