Error Splitting Column By Delimiter - Update Related?

[brent_milne]

I had a query that ran perfectly for months until I installed an Office 365 update yesterday. I am now getting an error that 'This query is too complicated to run'. I stepped through my query and the error appears when I split the column by a delimiter. After some trial and error I noticed that this only happens when I run the query from a database but if I query a webpage I can split it by number of characters or a delimiter. I was wondering if anyone else has run into this problem ?

 

[brent_milne]

This is the error I receive when I try to split the column.

Unexpected error: This query is too complicated to run.
Details:
Microsoft.Mashup.Evaluator.Interface.ErrorException: This query is too complicated to run. ---> Microsoft.Mashup.Engine.Interface.DepthLimitExceededException: This query is too complicated to run. ---> Microsoft.Mashup.Engine.Interface.DepthLimitExceededException: This query is too complicated to run.
at Microsoft.Mashup.Engine.Ast.AstVisitor2.IncrementDepth()
at Microsoft.Mashup.Engine.Ast.ExpressionToMVisitor.WriteValue(IValue value)
at Microsoft.Mashup.Engine.Ast.ExpressionToMVisitor.WriteRecord(IRecordValue record)
at Microsoft.Mashup.Engine.Ast.ExpressionToMVisitor.WriteValue(IValue value)
at Microsoft.Mashup.Engine.Ast.ExpressionToMVisitor.WriteList(IListValue list)
at Microsoft.Mashup.Engine.Ast.ExpressionToMVisitor.WriteValue(IValue value)