This is an update on Bug Report of now Invalid report MCPE-108171 now that I understand what is going on and have seen this bug in action enough times.

Edit One: Seems to be a glitch with the website when uploading the video MP4 file I have that I cut down to under 10 MB with Openshot. It only plays the audio when uploaded, so if you want to see this in action, download the video here from my MediaFire: Removed for Second Edit.

Edit Two: Due to Mediafire not working, here is the video file from Mega.nz : https://mega.nz/file/Mcw2iZpI#aubfmK1fAUl-oxbnVgo4l6n-llqCu6xPvVwZVmQDu3w 

Whenever a Blaze fires a Blaze Fireball if having a wall infront of it (This is rather hard to do), it has a chance of glitching out and firing it's Fireballs behind it instead of at it's target. These reversed fired Blaze Fireballs have the following attributes while they are present for 10-30 seconds; or before they hit something whichever comes first:

• The reversed fired Blaze Fireballs have a slower moving speed. This can go as slow as a player walks.
• The reversed fired Blaze Fireballs are sometimes acknowledged as a Mob by other Mobs. I have had Wither Skeletons stop chasing me to look at the bugged fireball, then look back at me and resume the chase.
• The reversed fired Blaze Fireballs can be jumped on, though will dissipate and hurt the player as normal when this is done.

 Steps to Reproduce:

1. Goto a Nether Fortress and fight some blazes.
2. Try to get a Blaze to fire Blaze Fireballs with a wall infront of it while firing.

Observed Results:

In some instances, the Blaze will fire it's Fireballs in a reverse direction at slower speed. These reversed fired Fireballs have some quirky attributes as mentioned above.

Expected Results:

The Blaze should either not fire it's Fireballs until a Target is clearly visible; or the Blaze should fire it's Fireballs forward into the wall infront of it.