My task consumes credit even when a participant just opens the link

URL of experiment:
https://run.pavlovia.org/bidirection/pbidplan_nl_et2/html

Description of the problem:
Hello,

I have charged my profile yesterday with 50 credits, while I had a couple of credit left.
Then, I had one participant who successfully did the task, but now I have less than 40 credits!

Has anyone come across with the same issue?

Best,
Reza

Have the credits been consumed, or just reserved? If someone opens the experiment but doesn’t complete it, the credit will stay reserved for a while, but will then be returned. (One can manually return them if necessary too.)

Hi, thanks for your reply. Some of them have been just reserved, but some have been consumed!