Redstone Block Activating Specific Blocks While Above and not Touching

Redstone blocks, with an air gap below it, activate certain blocks and keep it activated, these being pistons, dispensers, and droppers, only when the activated block gets a block update.

The pistons only require a block update if placed before the redstone block

Steps to reproduce:

1. place a redstone block above a dispenser (or affected block), with one air-gap between them

2. Update the dispenser (or affected block) by placing a block next to it

I put a water bucket in the dispenser for visual reference sake

It will stay triggered until you break the redstone block and update the affected block again

I was building some convoluted build where a dispenser with a water bucket was dispensing for no reason, and wasnt accepting other redstone output. There was nothing that should have activated it, yet it was, and only when i gave it a block update by breaking or placing something around it. Turns out it was a redstone block above it, that had an air gap between it. I tested and found out it was only certain block specific, with only effecting droppers, dispensers, and pistons to my knowledge.  I do not believe this is intended, and fixing would be greatly appreciated. For now, my water airlock design will have to do some minor renovations.