Item on the left hand disappear on join parkour

[niqofdez]

AParkour version: 3.4.7
Server version: Tuinity version git-Tuinity-"a608f71" (MC: 1.16.1)
Video: https://youtu.be/8vc19wW0eMc
Config: https://pastebin.com/DTFpMbEv

[redbau]

Our players constantly complain about this issue — parkour eats their offhand items! Would love to see a fix for this as this is a near-perfect plugin otherwise. 🙌