Fix sometimes validation for nested arrays
Backport an eloquent model fix
Merge pull request #5002 from GrahamCampbell/4.1-backport

[4.1] Backport An Eloquent Model Fix
Merge pull request #4076 from jarektkaczyk/bugfix/Fixes-sometimes-validation-for-nested-arrays

Fix sometimes validation for nested arrays
Merge branch '4.1' into 4.2