Toggle hidden field issue in VirtueMart custom fields list (Admin only / Hidden)

[sandomatyas]

Hello,

I'm using VirtueMart 4.4.6 on Joomla 5.2.6 and I've found a strange behavior:

In the VirtueMart admin → Custom Fields list, I can toggle the "Admin only" and "Hidden" columns directly by clicking the eye icons (toggle functionality).

When I want to enable the Hidden field (clicking the grey eye icon), it works fine — the icon turns green.

But when I want to remove the Hidden attribute (clicking the green eye icon), it doesn't change back to grey. Instead, I get an error message:

vmError: There was an error toggling is_hidden
vmError: VirtueMartModelCustom::toggle 99


Thanks!