HALlion tuning problems

HI Is anyone experiencing tuning problems with Halion 3 and sampler 6? Some of the sounds seem to drift out of tune and usually flat. I am using cubase 11 iMac Catalina

I have not had a problem with detuning, even across the sampled range, but did discover that you can change your centering frequency to something other that 440Hz which can wreak all manner of havoc on your recordings if you don’t remember to change all of them to that frequency.