Solaris 11.3: bash prompt content overwritten after 80 characters

We're running some Solaris Sparc servers with 11.3 version, and I see this behaviour in Putty:

SHELL is set to Bash

When I'm in a short path, no proble, he displays

servername id environment path

When the path is long, he's displaying

th rvername id environment pa

He's just wrapping the end of the path, to the start of the prompt name. I have Putty full-screen and I think it's 200 or 300 characters wide, not sure.

But he's wrapping at around 60 or 80 already

Which setting is dining that. Other Solaris servers don't have this behaviour