This is inaccurate information also.
Boyce's 6th game on the active roster was against Carolina and he didn't see the field. Also, the Patriots didn't have a kick return that game.
Boyce started doing kick returns in his 7th game against Houston. He had 6 returns that game. He had 2 more against Cleveland and 1 against Miami before going down to injury.
Again, Boyce earned playing time on Special teams. It shouldn't come as a surprise to anyone that his playing time on special teams coincided with an increase in playing time on the field..