This was on a 1.19.2 server. When placing a flask on the ground the flask appears to not render, after reconnecting to the server the flask would be back in the player inventory giving the appearance that the client believes the flask was placed while the server does not.
Also when placing a flask next to another item, such as a clay jug, it seems to place correctly but will cause some other odd behavior such as picking up the jug will fail to update immediately, leaving behind a ghost jug. This specifically occurred when placing the flask next to a jug and then reconnecting to the server and picking up the jug.
This was on a 1.19.2 server. When placing a flask on the ground the flask appears to not render, after reconnecting to the server the flask would be back in the player inventory giving the appearance that the client believes the flask was placed while the server does not.
Also when placing a flask next to another item, such as a clay jug, it seems to place correctly but will cause some other odd behavior such as picking up the jug will fail to update immediately, leaving behind a ghost jug. This specifically occurred when placing the flask next to a jug and then reconnecting to the server and picking up the jug.