Sculk shrikers can be obtained with silk touch despite in previous snapshots they weren't able to
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Relates to MC-249470 (which describes intended behaviour regarding the Sculk Shrieker)
I think this is Works As Intended because of the new can_summon block state preventing the placed shriekers from spawning wardens. I could be wrong, however if this is working as intended, then MC-249470 should be changed to fixed.
Your summery and description were mismatched so I've updated your description to match your summery