Are you using a third party plugin or Bubble’s plugin for Stripe?
Did you try using the bubble step-by-step debugger to see what’s happening?
Also it could be due to your data privacy settings. Maybe you’re setting privacy rules for the user. Run a flow where the user is paying and money is transferred to the seller account but before pressing click on step-by-step in the debugger and see if the seller account appears in the “transfer to seller” event.
Let me know if this helps.