Credits being used even for API timeouts and errors

Maybe this is just a "trial" feature, but will I end up using my credits if I get a license and the API timesout or returns an error.

On trial license, its definitely used 20 credits with just one "talk" successfully created. Evaluating text to video vendors for my firm and DiD is very limiting compared with say Synthesia for evaluation.

I can get authorization to pay for a license, but if its chewing through credits if I get error responses, its difficult to justify.