block breaking process can be stopped and can be continued later on

What I expected to happen was...:
the block breaks

What actually happened was...:
it didn't break but the cracks stayed an then I could continue breaking it

Steps to Reproduce:
1. block with a shield
2. hold down LM (to break)
3. let go of RM (to stop blocking)

4. let go of LM (it will stop but the cracks will stay)

to continue breaking the block do 1-3 (else the cracks will disappear and the block breaking process will restart)

if any other interaction is done with LM it will reset too