Writing to > 1 excel sheet

Hi,

I am trying to write to multiple sheets. I have two branches coming off the CSV reader (Among a few string manipulations). Then, I branch into 2 branches by using row filters. Each of those write to the same excel file, but different sheets. When I execute the workflow, only the 1st workflow actually writes anything. I feel like the second one is getting blocked due to the first one writing to the file.

What is the solution to this?