Okies, this is pretty uncommon since Ive done 500+ runs of SAB zones 1 & 2, but right now im standing in the very 1st checkpoint in zone 1 and it was impossible to pass it due to the blue thing not being blue (couldnt activate it).
It started to work while I was writing this post, like 90s after I came to it. Not a lag issue, since the monsters were moving, neither a graphical glitch, since I stepped into the thing multiple times.
Edit: possibly a conection issue, since I lost conection now. Not sure if my end or yours.