Hard freeze in Realms when opening inventory with shulker boxes

In the last few updates, having shulker boxes in player inventory will cause game to lag when inventory is opened.  New patch 1.10.0 makes game hard freeze for a few seconds when inventory is opened.  When the shulkers are removed from inventory there is still a minor delay, but when shulker boxes are added back, delay resumes.  Attaching video of gameplay.  Win 10 Pro 64 bit.  Realms server.