Yes - it’s called 64 bit Native application - as it should be designed.
Any 64 bit app that “allows” 32bit plugs - is doing so by providing a crutch - that usually ends badly within the host app.
Run 32 bit WL if you insist on sticking with 32bit plugs. Or clean house and go 64 bit all the way. There is no “in between” with Wavelab 8.
It’s been this way for a long while so do not expect to discover any additional “official” statements about it.
VP