Yes - believe it or not, many sequencers and/or midi interfaces struggle to handle sysex transfers of that size. For instance, I find that SX3 is vastly superior to Logic (PC) in this regard.
There are two things you can do - try playing back the sequence *extremely* slowly.
If that doesn't help, you might need to export it as a .mid file and play it back from a different app. MidiOx works quite well for this kind of thing.
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