ACC Simhub dashboard lagging

Hi everyone, sorry if this isn't the right place for this; happy to post elsewhere....

I have a specific problem with ACC and Simhub dashboards, no matter what wheel I use (I try on iRacing and all dashboards work just fine) - there is a significant (and intermittent) 3-4 second lag on any dashboard I use, including the Lovely Dashboard (which I would like to use). I've tried lowering graphic settings, disabling plugins (although I don't have many!), changing wheels etc... Running out of ideas! I have an Nvidia 4070ti and Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz; so wouldn't expect to run into this issue because of CPU/GPU load. And like I said, iRacing (and F1 23), the dashboards are perfect. Can anyone help?