Two problems with Siege

I was playing kuzenbo and realized my kappa ricochet doesn't bounce off of the Siege towers. I thought this was weird and tested it in every map and found out it bounces off every tower in the game besides siege's. Same could be applied to Hou Yi's ricochet.

The second problem is you can't make a custom game with bots in siege. You can make a custom game for siege and invite people but there is no option to add bots.

TL:DR. Siege towers don't let you ricochet Kuzenbo's kappas and Hou Yi's Ricochet. Siege Custom doesn't let you add bots.