The bug

Bow will auto draw an remain drawn whilst trading with Custom NitWit Villager, the Villager will be shot when finishing the trade

Steps to reproduce

1. Place commandblock, impulse, always active with command

   /summon villager ~ ~0.5 ~ {Invulnerable:1,PersistenceRequired:1,Silent:1,NoAI:1,Rotation:[0f,0f],CustomName:"\"Block Trader\"",CustomNameVisible:1,Profession:5,Career:1,CareerLevel:0,Offers:{Recipes:[
   {buy:{id:gold_block,Count:1},sell:{id:brown_wool,Count:1},rewardExp:0b,maxUses:2147483647},
   {buy:{id:gold_block,Count:1},sell:{id:white_stained_glass_pane,Count:1},maxUses:2147483647}]}}

2. Hold a Bow and Arrows in your Inv, whilst making sure the bow is active in main hand
3. Trade with the summoned Villager
4. Now you'll see the bow drawing and remain held
5. Upong ending the trade the arrow will hit the Villager