The crafter does not update correctly

I designed a system to enable the creation of blocks for all recipes that allow it using 9 identical items.

I maintain a signal strength of 8 with the composter on top to prevent state changes detection from the observer and premature triggers before it is filled with 9 blocks.

How to reproduce:

• Set up the system as shown in the image.
• Set the composter to the maximum (8).
• Manually fill the crafter with iron ingots to create the block
• Walk on the string next to the comparator or clic inside the crafter

What is supposed to happen:

• The crafter fills up.
• Creates a signal of 9.
• Activates once to create the item.
• The signal returns to 8, and this loops.

What is happening:

• The comparator remains stuck on a signal of 9 even though the crafter is empty and should revert to 8.
• The update occurs only with the next item passing through, triggering a new pulse.
• This creates an item too early.

This continues until a manual update of a block next to the comparator, which should not happen. So the issue is coming from the crafter.

Passing over the string a first proves nothing is happening before. The manual update unlocks the situation but creates a second pulse that is not supposed to exist. In the system, this activates the crafter too early and creates nuggets.