Buildings auto clearing? turn on your X-MAS lights to let your neighbors know...

I've got it now too. iOS 9, iPad. I noticed it started happening after the end of monorail, when I started grinding SH resources again, after I bought some tennis courts. I know correlation isn't causation, but maybe we can find a common thread between all of us who've been impacted.

I've thrown down a big plot of brown houses for friends, all else I can do is say sorry util we know why it happens.