I obviously don't know CF's code, but in the version of POS we are running, which was at some point forked either directly from CF or from a common parent, the generic saves spell check also checks if you resist the damage type and gives you a bonus to saving if you do (and vice versa if you are vuln). So there is at least some chance. It also might depend on how zulg implemented the new resists system.
Now I don't think bash has a save, but who can know for certain. It's possible... (but unlikely) they simply re-used the saves code in basically all contested skills.