9810-03J
The image appears expanded from about 120 mm away from the tail edge of paper
Fixing speed is inappropriate for high strength thick paper.
← Feeding Direction
* About 120 mm (4 3/4") away from the tail edge of paper
Remedy
Adjusting the fixing speed according to the degree of expansion/contraction may improve the situation.
Decrease the speed by: Press 
→ [Preferences] → [Paper Settings] → [Paper Type Management Settings] → select the problematic paper type → [Details/Edit] → [Change] for <Adjust Paper Conveyance> → [Fixing Area] .
→ [Preferences] → [Paper Settings] → [Paper Type Management Settings] → select the problematic paper type → [Details/Edit] → [Change] for <Adjust Paper Conveyance> → [Fixing Area] .
"Paper Type Management Settings" > "Adjusting Speed of Paper Conveyance" in the User's Guide