I have'nt noticed the issue (old Yamaha CP-33 as main controller on Win 10). I tried with full chords on Keystep 37 but maybe not long enough.
Piano V3 calibration is a bit tricky and extremely important. I had to tweak the resulting "curve" mimicking the CP-33 curve in Pianoteq (you can drop different curve settings in Pianoteq).
For Keylab-88, it would be [0, 14, 27, 37, 52, 72, 98, 113, 127; 1, 8, 24, 41, 65, 85, 106, 118, 127].
It would be a nice feature for Piano V3. I like the way you can tweak V3. It takes a lot of trial and error but it's quite transparent.
Cp-33 is old but the touch (I forgot the technical term) is heavy and that's the way I like it. I tried the newer CP73 and did not like it.