[Elecraft] Strange behavior of P3

[Martin]

My P3 shows some strange behavior when combined with a K33 (newest firmware on K3S and P3):

1. When the subreceiver is turned on in LSB mode (listening to a qso on the low
bands) and VFO B cursor is also on, the cursor VFO B changes from LSB to
USB, if the mode of the main receiver is changed from any mode to TX DATA (Submode
DATA A). Although the K3S is still receiving in LSB on subrx, the P3
shows USB cursor.

2. When turning on ATT (K3S) the signals on P3 screen (and SGVA Monitor)
drop down. They remain stable at the same level if PRE is turned on. When using my K3 the
signals remain always the same level. On the high bands (12 or 10m) the
signals on P3 drop when activating the preamp 1, they drop even more when
activating preamp 2.

Any explanation for this behavior of P3 ?

73s, Martin DK8ZJ