It’s fine, the real issue is dealing with the bass and midrange resonances that the center will have on a shelf. If you can clean that up via manual DSP or decent speaker correction you’ll be fine. I've done this before.
Like all "bookshelf" speakers, center channels will avoid several problems on stands, but few of us have the floor space, myself included. This is why I’m using a DSP based amplifier for my new center channel project, so I can carefully tune the inevitable challenges.