Server version is Fabric (latest) 1.20.4
Fabric API version 0.96.4 (1.20.4)
iCommon API version #68
Tested builds: Cardboard 1.20.4-1 and 1.20.4-2
Side-note: 1.20.4-4 resulted in the server refusing to start. (Seems that is a separate common issue)

Upon using either of the two working versions of Cardboard for Fabric 1.20.4, I experience the following:

• Dying in lava results in the player remaining on fire and taking damage upon respawn
• Dying to any mob results in the player continuing to take the hit upon respawn
• Hunger bar persists upon death and never resets to full status

While trying to troubleshoot, I noticed the following warning in the server console:
29.05 15:29:37 [Server] main/WARN Method overwrite conflict for getPlayer in bukkitfabric.mixins.json:network.handler.MixinSPNH_PlayerCommandPreprocessEvent_1_19 from mod cardboard, previously written by org.cardboardpowered.mixin.network.MixinServerPlayNetworkHandler. Skipping method.

I can do additional troubleshooting as advised if necessary.