massDelete CMS Block not working (error 500)

[nelero]

Hi,
i'm using the latest stable 2.1.x version.
When i try to mass delete some cms blocks (1 or more checked), i receive an error 500 and blocks are not deleted.

But if i click individually on the block, access the detail page and click delete, the block is deleted as expected.

How can i fix this ?
thanks

[harshvardhanmalpani]

Duplicate of #8415 and #8418

[orlangur]

@harshvardhanmalpani yeah, thanks.

Issue seems to be fixed on develop but not backported to 2.1.x yet. Anyone from Community can do it due to https://community.magento.com/t5/Magento-DevBlog/Pull-Requests-for-2-1-x-Patch-Releases/ba-p/65630.