double SRC and stuttering in Bypass

For a technical project I have to preview with 6000 Hz SR. Therefore I use a Resampler in the Mastersection and resample back to 44.1 kHz. This works fine for playback, but when I bypass the Mastersection with the two SRCs I get stuttering and jumpy playback. For this Bypass seems broken. Bypassing both single SRC works without problems. Of course “Bypass Master Section” would be much more convenient.

edit: WL Pro 9.5.35 (macOs Sierra)

I can reproduce this on Windows. Boy, 6000 Hz sounds great.