@imtiazraqib But you said that you have code that validates the values. It must be doing something that’s taking time.
We need more information to understand what’s happening. What is it that you are doing? Try to create an absolute minimum scenario where you just save the data to the database collection without all of the other code. In this way you might be able to identify where the problem is.
If you suspect that this is a system bug, then realize that this forum is not a support site and is not monitored for bugs or system issues. Please report bugs to Wix Customer Care to ensure timely handling of your problem. They track and monitor all incoming issues and will escalate bugs to product teams.