Node page title changes to 'Create new account' when user reg block displayed

That sounds strange - may be a bug. Can you describe or, better, paste a snapshot of the Layout you are using to display the node and the block? Are you overriding node/% to do so? Or creating a new path?

You pasted the block configuration snapshot. Can you paste the Layout itself?  

The function user_register_form() does have a line backdrop_set_title(t('Create new account')). 

Instead of visibility conditions on the block, you could try a custom layout for that page, and with visibility conditions on the layout, then try modifying the layout page title itself. Dont know if that would override the hard-coded title, but worth a try?

Instead of visibility conditions on the block, you could try a custom layout for that page, and with visibility conditions on the layout, then try modifying the layout page title itself.

If that doesn't work, there are a couple of other options:

• Override node.tpl.php (you would need to copy it to node--58.tpl.php inthe templates folder of your theme)
• Create a custom module that uses hook_FORM_ID_form_alter() to rewrite the title with backdrop_set_title() (hard coding it to whatever you want) 

I would also suggest that you open an issue in the queue. It seems wrong that the form is hard-coding the title. Makes it hard to override it in layouts as you saw...

@nattywebdev I'm unable to reproduce your issue. I've tried with Basis, and the node title is preserved and looks correct when I include the User Registration Form as a block (I'm using the module Form Block to expose that form as a block). See snapshots below. There must be an important detail that I'm not considering. Perhaps it's the node template provided by the subtheme of bootstrap5_lite? Can you try setting Basis as default?

Ignore that!! I had modified the function. Now that it's back to the original I AM able to reproduce the problem. I'll be creating an issue in the Backdrop queue. Hard-coding the title is not a good idea...

I've created an issue in the issue queue. Hopefully someone will suggest a solution - I can't think of a good one other than the hacks I suggested above. I haven't try @dowilmot's suggestions.

Instead of visibility conditions on the block, you could try a custom layout for that page, and with visibility conditions on the layout, then try modifying the layout page title itself.

After trying it, I can now confirm that @docwilmot's suggestion doesn't fix the problem.

I've submitted a PR that fixes this problem. It hasn't been tested or reviewed yet, but it'd be great if you could test.

https://github.com/backdrop/backdrop/pull/4182