toilet flush

[eagleeye]

I have an issue with a customers toilet. Logs flush away fine but paper just sits on top. Checked all levels and all found to be ok. Tipped a full bucket of water down fast and paper still sits there. Only thing i can think of is a blockage or vent blocked. Pan is an Armitage Shanks. Anyone else ever had this and if so how did you resolve issue

 

[rpm]

Have found in the past that too much water can cause this on a duff pan, can only suggest start float valve at lowest level and slowly increase the amount of water entering the pan.

 

[Toolsnrules]

This maybe a stupid idea but maybe it's the toilet paper , try another brand ?