Bleed in centre of spread

See my reply here:

https://community.adobe.com/t5/indesign-discussions/bleed-check/m-p/15199810

(Scroll down to the actual reply to watch the animation better.)

I'm making a little booklet, magazine thing.

Hi @JackJJW ,  Most magazine bindings are folded and gathered—the inside edge is not trimmed, it’s folded. There is no need for an inside bleed even with perfect binding. I agree with @Eugene Tyson , ask the printer if they need a bleed and care whether is comes from the opposite page

Hi Jack,

You might try selecting your pages. Then click the Pages panel menu button and turn off Allow Selected Spread to Shuffle. Next, drag each right hand page further to the right until you see a straight vertical line and release. The pages will still be left and right but they will stand apart.

This is normal. The printers take care of this at imposition.

Talk to your print provider and find out what setup they need and if it's acceptable. 

If you have a normal binding, you can ignore the middle bleeed. Only in case of wire-O-binding you should take care on the problem. Look here, how I would solve it: https://youtu.be/YSehVZV3pOI