We have a strange issue where components seem to be duplicating on the front end (web DB) but everything looks correct in the experience editor. I have checked the presentation details on both shared/final layouts in both master and web - but it looks fine. It also renders fine when viewing the experience editor when switching to web.
We are using dynamic placeholder - based on this implementation.
The strange thing is it was all working fine and then suddenly happened at some point but we can't track down what might be the cause.
Sitecore version: 8.2 - web forms.