This used to happen a year ago, and there is a long thread on the Note 3 forum. Could be a temporary issue with Lollipop.
I don't have Lollipop on my Note 3, and I don't even have my Note 3 right now.
Try Nova launcher temporarily, I started using it after 10 months.
It has a default setting to set Nova, Touchwiz Easy or Touchwiz Home as a one time or default launcher.
You don't have to change anything if you don't want to experiment with themes.
I just used it to increase the number of icons on the homescreen and bottom dock. You will like it. It's very stable, efficient and highly recommended on AC.
Switching back to the TouchWiz launcher is like closing the Nova app, and as it's mostly for themes, full Touchwiz and settings run in the background anyway.
(I'm the worst person to describe this properly, but as there was no one else...
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