Keeping 4K after After Effects

After some subtle adjustments of skyscape time lapses in AE (namely de-birding), I notice that even after several different methods of rendering the video in AE, Pond5 will not recognize it as 4K after I've done anything to the footage in AE.

Fully aware that Pond5 encourages footage as un-altered/un-processed as possible, I'd just like to know if there's something wrong I might be doing in AE re: rendering that cuts out the possibility of keeping it 4K for Pond5. Dicing up time-lapse videos to avoid the bird-peppering might result in more clips, but I would just like to know if there's a way to use AE and keep 4K all the same.

Thanks in advance.