when running, right?
Yes
the square you were on moment before? that's possible.
No, the next one.
do you feel lag when moving?
no
what's your ping?
I read betwean 27 and 40 ms
It's easy to see it if you press the movement button and "just after it" the space button (nearly contemporary, but first movement button), I think that the bomb should stay on the square before, where the character was before moving.
The character is just few pixel on the next square, the majority of its image is still on the initial square, so it's here that I think that the bomb should drop.
Also, I see that if I maintain pushed the space button, the bomb doesn't drop, I have to release it to drop the bomb. Maybe it's better to drop the bomb just by pressing the space button.
Anyway, this is just my opinion ...