Suspicious Stew cannot be consumed when the hunger is full, which is not consistent with other effect-giving consumables. This bug was fixed in Java 1.17 snapshot. (MC-195640)

Step to Reproduce
1. Get a suspicious stew by doing /give @s suspicious_stew commands
2. Switch to survival mode
3. Try to eat it, make sure your hunger is full.
---> You cannot consume the stew.

Expected Results
You should be able to consume the suspicious stew, even with full hunger.

The Fix
This issue can be fixed by going to the suspicious_stew.json file, and adding the "can_always_eat": true line in the "minecraft:food" components.

{
  "format_version": "1.10",
  "minecraft:item": {
    "description": {
      "identifier": "minecraft:suspicious_stew"
    },

    "components": {
      "minecraft:use_duration": 32,
      "minecraft:max_stack_size": 1,
  
      "minecraft:food": {
        "nutrition": 6,
        "saturation_modifier": "normal",
        "can_always_eat": true,
        "using_converts_to": "bowl",
        "on_use_action": "suspicious_stew_effect"
      }
    }
  }
}