Pillager doesn't break their crossbow

When breaking a pillager crossbow,it doesn't break it,i try 5 hours to break it, i break my 14 shields,it doesn't work and sometimes it does crash.

Expected:

The pillager should be break crossbow in 3 or 4 shields.

Actual results:

The pillager doesn't break there crossbow at all.

How to reproduce:

1.pillager should be break there crossbow it's own.

2.when you hold 3-4 shields it should break it. 

While a small bugs but it should be add in Minecraft bedrock.pls add at pls pls pls.