Why wasn’t Derek’s kiss with Renee a bigger deal?

I know it was in the fateful 11th season where everyone was already on edge about Patrick’s departure. But I find it odd that Derek kissed Renee and the audience found out about it, but the show never did anything more with it. It feels weird that Meredith never found out and I understand maybe it was a plot device to force Derek back to Seattle but I still feel weirded out that the show did literally nothing with it, even post-Derek.