Fixed: Dropdown lists causing validation issues.

Fix

We've rolled out a fix for an issue experienced by people registering or buying tickets for some events with a dropdown list in the form. When trying to save their details, they may have seen a validation error even if the dropdown appeared to be populated.

A huge thanks, as usual, to the people who took the time to report this issue, especially as it was easily worked around. We really appreciate it 💛.