ENTITY_PLAYER_ATTACK_CRIT and ENTITY_PLAYER_ATTACK_STRONG occur when AttackCooldownProgress > 0.9f. However, CROSSHAIR_ATTACK_INDICATOR_FULL_TEXTURE(crosshair_attack_indicator_full.png) only appears when AttackCooldownProgress >=1.0f.
This bug may confuse new players and those who have switched from an old version of the game to a new one and are just learning about this combat system. Also, this bug gives an advantage to those who know about it.

I expected that crosshair_attack_indicator_full would appear at the moment when critical and strong damage would be available - this moment when AttackCooldownProgress > 0.9f. However, it is not. crosshair_attack_indicator_full appears when AttackCooldownProgress >= 1.0f.
Here are the steps to reproduce this bug:

1. Go to Minecraft.
2. Be sure that Attack indicator: Crosshair is enabled in video settings
3. And hit the entity between AttackCooldownProgress > 0.9f and <1.0f (you can use a sword or any other item)
4. And you will see that although a strong and critical attack is possible, at these moments the texture does not appear.

InGameHud.java
CROSSHAIR_ATTACK_INDICATOR_FULL_TEXTURE will appear if bl = true(string 398). bl = true if f >= 1.0(string 392) Cooldown Progress >=1.0f.
PlayerEntity.java
ENTITY_PLAYER_ATTACK_SWEEP(string 1084), ENTITY_PLAYER_ATTACK_CRIT(string 1093) and ENTITY_PLAYER_ATTACK_STRONG(string 1098), will be executed if bl = h > 0.9f(string 1034), variable h contains information about CooldownProgress