Beacon instantly turns on, on the first tick when placed

Beacon instantly turns on, on the first tick when placed down on a power source (Iron Blocks, Gold Blocks, etc.) This issue doesn't occur when finishing the 3x3 square with the beacon already on it.

How to reproduce:

1. Build a 3x3 Square of Iron Blocks
2. Place a Beacon on the 3x3.
3. Observe the Beacon Turning on

Observed Results: The Beacon turns on, on the first tick.

Expected Results: The Beacon should have a tick delay when turning on.