Yes, this is unfortunately true. See also [done 3.1] Instruments with FX are tied to one track?
The problem is that FX could in principle be used to apply volume, pan, etc. changes to a group of layered samples (due to the lack of sample groups). But the limitation you mentioned prevents this of course.
In general, the usage of the sampler for drums is quite limited indeed and it is unclear to me how taktik and crew intended it to be used for drums.
I also created a topic recently to put some focus on using the sampler for drums, which seems to be an afterthought at the moment: Better support for drumkits in the sampler