it is possible that the chip has some function (we did not design it), that when it is near empty it will auto-reset when removed from the printer and put back in. It would appear at this point that there is some level at which it does that. The important thing is to take notice of the Epson Status Monitor and how it thinks your carts are filled. If you know a cart is not full - but you see the status monitor reset it to full after removing it to shake - then you must remove it and fill it to 100% full with ink.
Most of our customers are using them until the printer reads empty and then refilling and resetting. So this is not something that comes up very often. The times it has come up are documented on this tech forum and its very rare in comparison to the amount of users on this product.
We do believe in shaking ink carts (especially if the printer is not used often). But refillable carts with these chips need to be monitored.
If the chip does not function - let us know and we will replace it.
Can you please tell us how you reprimed this position without the syringe? WE have been instructing to reintialize the printer. What was your procedure?