Rendering midi to audio, repeating step problem

(Cubase 11) What I want to do is render 8 bars, and then render it again at half speed. When I attempt to do this, the first part goes fine, but the second one turns up blank. The synth in question is Omnisphere, the patch is tempo-locked and arpeggiated. Any clues?

Update: it appears that the 8-bar sequence is locked in some way after the first render, and isn’t playing back. This is probably the answer, but how do I unlock the source?

Solved: in the properties bar just below the menus, there’s a mute option just needs to be deselected

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