Links with hash references are now broken in custom elements?

Question:
Our intra-site links have broken. Links of the from www.abc.com/subpage#ref have stopped working. They had been working for several months, but it appears a Wix software update may have broken the function.

Product:
Wix Studio Editor, Velo

What are you trying to achieve:
We want to restore link functions.

What have you already tried:
We received the following guidance from support, but it makes no sense to wire in a custom scrollTo() when we are using a standard URL:

issue is due to the fact that the URL mechanism set inside the custom element is not supported.To resolve the issue, use the button click events inside the custom element to send the local URL as data to page code and use Velo’s [redirect] function to navigate to that page.

Additional information:
We have tried escalating through channels as we understand them. What more can we do?

Were these working for you previously in Studio?

Absolutely. We had not made any changes since, perhaps, November. All was well. We think something changed in January to break the links, but we’re not sure when.
To be clear, we’re talking about being unable to specify a link in the “standard” fashion, with a page location designated by a “#”, such as abc.com/pagename#location1.
We’re quite sure something changed to break support for this standard URL notation.