Withers don't break obsidian when attacked

Yeah, I wanna have obsidian farms.

The wither destroyed all blocks around in my world including obsidian, Windows 10 PC Bedrock Beta v. 1.15.0.55. 

This adds new possibilities for wither cages and wither rose farms, so it could also be considered good.

It will break obsidian farms

This is not a duplicate of MCPE-63223. That report is about the wither skulls not being able to break obsidian.
What is being meant here is that when attacked, the wither does not break obsidian. It is meant to break obsidian, just not during its spawn animation.

I really want to make an obsidian farm but its impossible right now

This bug is very old but I want to bring live back into it:
Due to a parity change in 1.16:
"The Wither no longer breaks obsidian during its spawning animation (MCPE-59502)", wither are no longer able to break obsidian with their "Block Breaking Attack". This attack breaks all blocks around the wither once you attack it with any kind of projectile or weapon.

This change still exist in the lastest 1.17.2 release, which is a shame as this is with disparity with Java Edition where withers can break obsidian like shown in this video: https://www.youtube.com/watch?v=weUOfJlg1hk

To show proof of it being still an issue, I have this video made in 1.17.2 (see the crystals):

If you want to test it for yourself, I have made this worlddownload for you, which saves some time: