@Greg55 I faced with the same issue today…
For me the issue was looking this way:
I discovered that this is because I disabled Evaluate World Position Offset
for all PCG instances.
I had to re-enable it, but, for better performance, I also removed the connection to World Position Offset
in the instance material (not the imposter):
Now I think I could reconnect this World Position Offset
for for high quality LODs materials.
But, if anybody knows a better solution, please share.