That behavior is consistent with any other block you can move and interacts with comparators. Try a composter for example.
See https://bugs.mojang.com/browse/MC-120986 for reference
It is slightly more intuitive. But older player structures are more important in my eyes. It is more than structures.
Design patterns have evolved around this specific mechanic. One of the most commonly used instant lines for example just broke.
There are entire CPUs build on update order. This is all to make Redstone a tiny bit more intuitive for new players.
If the devs however disagree I'm also open for change.
But that should also mean that Redstone update order should get fixed to make it more intuitive and increase its performance.
Update supression is probably a bug yeah but its been used in the game for years.
It was treated like a mechanic by the players - as far as Im concerned its the lesser of the 2 problems.
I could see why they removed this feature any day.
What Im more concerned with is the fact that rail update order changed.
This would mean about half of our server would need rebuilding from all the instant lines and advanced contraptions that use it.
While removing update supression does not actively break anything on the server the other change does.
Rail update order is relied upon. Yet it was changed because reversing it would easily fix another thing they wanted to fix.
That other fix was only made because that would easily fix another bug caused by their rendering engine.
Now this is just lazy coding. You can keep update supression when you just properly fix the rendering engine.
You can keep the rail update order if you would just implement a lifo stack for all the blocks that need updating.
These are all actions that could have been taken to keep a block interaction as it is in a game that is based around block interactions.
As it stands the server we have probably will not update - I imagine most others that are hit by this would do the same.
That actually affects most mobs when walking below slabs.
E. G. Villagers can't pathfind between bottom and top slabs.
The issue is not the height.
Yes the bug is the same.
Your dispenser block is already redstone powered and therefore doesn't get powered again.
This is not a bug - you didn't build it correctly.
The new code is already supposed to do that @Green_Truck50