I was testing an automatic piglin trader in creative and some of the droppers did not fire, even though they had power and items. On the F3 menu the ones that were fired always said "triggered: false" while the broken ones always said "triggered: true." If I broke and replaced the redstone, or placed blocks around it, it will work once and then go back to not working. I tried putting a trapdoor next to it that would activate to update the block if there was something like that but it did not work. On the first picture you can see the 3 piglins that do not have gold, and the 2nd shows the redstone setup.