So my friend and I were playing multiplayer over a LAN and I had switched to sniper while he focussed on melee. We were playing Highlands version 1.12.2-0.2.7+build224 with the accessory mods Jei 1.12.2-4.15.0.268, DamageIndicators 3.5.1, Optifine 1.12.2_HD_U_E3, Hwyla-1.8.26-B41_1.12.2, Wawla 1.12.2-2.6.275, and Xaero's Minimap 20.5.2_Forge_1.12.

I tested with two crossbows (the Holystone Crossbow and the Gravitite Crossbow) using Scatterglass bolts. The issue seems to be graphical only; all players can interact with landed bolts, and mobs still take damage correctly (an exception being Aechor Plants, which repel bolts similar to how primed TNT does).

Edit: The bolt still shows up for the player who fired it (forgot to add this originally).

I'm stressing that it's minor because it doesn't affect gameplay all that much, but it should probably be looked into.