Thank you for reporting these issues!
I will now comment on what you mentioned:
- The first issue will be easy to fix, so I will patch it soon
- I will look into the elf's skill. I personally haven't experienced this bug so I hope I can reproduce it
- The dwarf's skill, should work, as when I test it it lets me move just fine, a little slower though. The damage reduction should work too.
- The potion bug has already been reported and I will try fixing it soon