Rem Tag Along bonus spirit power with echo shard

[nossy]

When you use Tag Along for a second time before the lingering bonus spirit power has worn off (achieved with echo shard in game, or toggling No Cooldowns) the bonus spirit power affect is applied inconsistently (I think). It applies for a second time while Rem is tethered to an ally, but immediately goes back to just the single stack of spirit buff upon leaving the ally. I imagine the "correct" behaviour would be to either not double up the spirit buff effect at all, or have it be two separate durations that can overlap for the lingering spirit buff.