It is clearly a lack of practice or lack of practicing the correct way on offense. You simply have to contrast it with what the Jags were able to do on multiple third downs - Lawrence faced the rush and threw it to a specific spot on the field he knew his receiver would end up in due to the coverage and play call and it worked over and over again. That is a well-timed, precise, practiced and properly COACHED offense that a lesser QB than Allen was able to execute successfully.
We need an overhaul of the entire approach on offense, from the roster allocation strategy to the coaching. I am convinced.