After upgrading Resharper to 2021.1.4, ForTea gets namespaces confused

[dmcbride]

Having updated Resharper to 2021.1.4, using VS Enterprise 2019, now ForTea seems to assume that my tt template must be living in a different namespace than it really does. It appears to be marking my partial class as not related to the T4-generated code, thus signifying that private variables and methods that I have for the T4 template can't be found.

Note that when I build, the solution builds fine, this is largely a visual issue, which also affects Intellisense so completion of variables and methods no longer work.

For example, in my partial, I say that this is an ITemplate, which has public string TransformText(); in the interface. That is, of course, implemented by the T4 generated code, but Intellisense + ForTea thinks that this isn't met, so I get the red squiggles. Further, my partial has a function public string Html(object o) {...} and a field private readonly string _foo; and inside the tt file, where I have <#=Html(_foo)#>, both Html and _foo are in red as not-found, even though the compiler is perfectly happy.

This seems like a bug in either Resharper and/or ForTea.