I only tried it once but it did not give good results for me as I only have 4 wins from 11 matches and 2 of them are 2 consecutive surrenders. It also uses starter cards despite setting the bot not to use it. It's on modern silver btw with max level bronze and cl deck owned and some key untamed cards rented.
You can certainly report any issues on their Discord. There is a reason it's still in beta, as things are still being fine tuned and some bugs are still present. I've let my Darth Squirrel account run with XBOT, and despite it being only a bronze level deck it has a winning record in gold.