Time remapping a nested sequence results in black/empty video

Hey!
I have a long sequence (47 minutes), which I wish to time remap (to increase the speed at certain Keyframes). I have therefore nested the sequence into a Master Sequence, where I perform the time remapping. However I experience what appears to be a weird bug: At a certain frame the video turns black/empty and stays that way - even though the original sequence still has video material.
It doesn't help splitting the clip (nested sequence) up in smaller clips and time remap those individually - the empty frames just appear earlier in each clip.
Export works fine
When I export the sequence as Media, the output seems fine however.
I hope, that you are able to help me or tell me, if I'm doing something wrong.
Thanks in advance!
Hardware info
I work on a MacBook Pro (Retina, 15-inch, Mid 2014).

it depends on how powerful the video card is, and how many accelerated effects are being used. it might slow you down a little, or alot. if you have an intel graphics, they arent very powerful to begin with, basically just good for browsing the web. however premiere tries to use them and they cause lots of problems. im not sure if its premiere or intel thats causing the problem, but they dont play nice together.  if you have the nvidia version macbook, you might have opencl or cuda available in the renderer menu. if it was on opencl, could try cuda, or opencl if it was on cuda.

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