Yeah I can't confirm that there is an issue with R11, but can only say that I'm not having issues in R12 with the plugins that I use. I don't remember any specific issues or fixes with delay comp.
You could download the latest version of R12 and run it in demo. In demo mode you can still load VSTs (and VST3 versions).
viewtopic.php?f=4&t=7525554
If you have a project file you can share, while I don't have the Linear Phase EQ plugin, I can confirm if there is anything else that might be causing an issue.