The fix for MCPE-80555 in 1.16.100 (which attempted to correct the fix for MCPE-54244 in 1.16.0) applies only to hoppers/hopper-minecarts collecting items. It should be applied to hoppers/hopper-minecarts pulling from hopper/chest-minecarts as well. Indeed, that was the original context in which the issue was discovered (namely, inventory blocks no longer capping hoppers from pulling from hopper minecarts due to the way MCPE-54244 was fixed--see MCPE-68912).

Steps to reproduce

1. Build either of the setups shown:
   
2. Put items in the chest minecarts.

Expected result

The chest and barrel (and any other inventory block such as a furnace) prevent the hopper and hopper-minecart from pulling items from the chest minecarts.

Actual result

The hopper and hopper-minecart pull items from the chest minecarts despite the presence of an inventory block.