Amazing how no one did enough research to uncover this, isn't it? Unfortunately, this happens often.
The other big surprise is when lenders purposely under collect when setting up escrow account for property taxes. Many lenders just automatically collect at a rate of 1.25% and don't bother to collect at the actual effective tax rate which could be as high as 2.5% if buying in certain parts of MoVAl or Menifee.
An experienced local real estate agent will usually know the tax rates in their area. The info is not difficult to access and disclose.
I assume the servicing lender will now increase your payment a few hundred dollars a month to catch up on your escrow shortage? Or are you able to write a big check to pay those special assessment taxes?