I am having such bounding errors, should I get worried and reduce relaxation? I already use 1st order upwinding with gradient limiters. (Resolved k-omega-sst. I set k as 1e-15 at walls. Could this be the culprit, maybe I should set it to something even smaller?)

bounding k, min: 4.28442e-16 max: 2.03794 average: 0.00614192
bounding k, min: -4.05643e-11 max: 2.03743 average: 0.00617002