Selecting multiple measures with chords not possible

When I click on a measure with notes and chords it is not possible to select (add to selection) the next measures. A measure without chords is no problem.
I’m using the SHFT key and clicking in the measure.
Lassoing is no problem.

I think there is another topic about this : https://www.steinberg.net/forums/viewtopic.php?f=246&t=121605