Hello - inbox hidden preheader text hack stopped (hiding additinal characters to fill the space) working on iPhone after the early April iOS 16 update. Has anyone else seen the same or a reported change? We have been using  ‌ for several years.

a recent blog post https://www.litmus.com/blog/the-little-known-preview-text-hack-you-may-want-to-use-in-every-email/
mentions

To get the most coverage, M.J. Robbins suggests adding   and  as these HTML entities add space that are still supported in Yahoo and iOS 16.4.

I'd apprecitate feedback if anyone has added   and  and can confirm it works. Our ESP testing tool adds text and will make testing difficult.

Thanks.