Why do some vsts work in Bespoke Synth (or any DAW) and others don't?

Question

I use a lot of the vst synth plug ins from K Brown. They all work in Bitwig and Waveform but only some of them work in Bespoke Synth. I have been googling why some vsts work and others don't but I can't find anything that comes anywhere near addressing that question. They all seem to be made the same way and are all vsts, do I can't think of why some would work and some not.

I also am just starting to program my own audio plugs and I plan on making some virtual instruments and I think this information will help me. I'm not asking for a too in-depth answer, just a short explanation that will point me in the right direction please.

Answer 1

Might simply be a 32 bit / 64 bit problem.

Bitwig still supports 32 bit plugins while most host softwares have stopped to do so. (You can use something like JBridge to still use them in such a host.) So check if the problematic VST are 32 Bit while the working ones are in 64 Bit.