Hiya fov,
It's not a bug (excepting the graphical glitches you're experiencing). But it is a frustrating / repetitive puzzle.
Keep clicking on the question mark icon bottom right of that scene to get more and more levels of help on how to get away...
Oh, and here is a better forum for gameplay walkthroughs (though I do understand you thought this was a bug);
Hints/Tips/Tricks .