I tried what you suggested (deleted all instances of HALion) and indeed there was no delay with the saving. So the delay is clearly a VST issue....like you suspected.
While we are on the topic of delay, I am also having latency issues when I play in music. There is really slow response from Dorico. Can you suggest ways that this could be improved?
Is there a settings preference to improve this?
Mac Pro Late 2013 6-Core 32 GB
Logic Pro X 10.2 4
2 x Vision DAW Slaves