Hey Tim, To be honest, i think it's because i was lazy, and tried to do the setup as quickly as possible, and instead of tweaking the exposure on the hdri dome, i just cranked up the primary bounce rate to a level that technically yields unrealistic results, physically speaking. I used a 3x primary bounce multiplier when normally you should leave it at 1. That way you exaggerate the lighting in a render making everything that bounces light look overexposed, but you also come across abnormalities like this. Might also be related to the fact that i've somehow managed to rotate the sky dome in such a way that light comes in perpendicular to the side wall, and combined that with the fact that the frames of the windows receive less bounces than the underside of the table, they tend to look less exposed. Might also be related to the fact that i'm using an hdri map for light, and not an actual directional light per se.
Might also be that i have no idea why this is happening and i'll just do another render with more accurate settings and see what happens :)