Check settings inT77S0 for
PLOGI TEXTC
PLOGI TEXTO
PLOGI TEXTS - This should have value X, I believe.
I remember the text from a PD objected in IT 1 display depends on the validity period of the PD object change and the IT 1 validity period, as well as today's date.
It is also possible to split the IT 1 record when PD object text is changed (provided PD/PA integration is effective), with PLOGI SPLIT X.