Marcel Taeumel uploaded a new version of Morphic to project The Trunk:
http://source.squeak.org/trunk/Morphic-mt.1977.mcz

==================== Summary ====================

Name: Morphic-mt.1977
Author: mt
Time: 28 April 2022, 2:56:50.140338 pm
UUID: 33a7d9ed-8946-a043-a299-464ddd24f41d
Ancestors: Morphic-mt.1976

Fixes lock-up regarding #haloTransitions preference.

Thanks to Lauren (lrnp) for reporting this!

=============== Diff against Morphic-mt.1976 ===============

Item was changed:
  ----- Method: HaloMorph>>delete (in category 'submorphs - add/remove') -----
  delete
  	"Delete the halo.  Tell the target that it no longer has the halo; accept any pending edits to the name; and then either actually delete myself or start to fade out"
  
  	self acceptNameEdit.
  	self isMagicHalo: false.
  	
  	Preferences haloTransitions
  		ifFalse: [super delete]
  		ifTrue: [
  			self
+ 				lock; "Just a delete-animation from here on. No interaction."
  				stopStepping;
  				startStepping;
  				startSteppingSelector: #fadeOutFinally].
  		!