Ouch! OK, thanks. When you say "our current mobile theme" is that some background behind-the-scene thing? I ask because I chose the Able theme (after testing many others) mainly because it was supposed to be "responsive" to variable screen sizes like we find with mobile devices. And I presume from your answer there's nothing I can do but wait until it's fixed. I hope this is given priority because I'm sure my website is not the only that is now crippled and useless on large touch screens.
Many thanks for your prompt replies and for clarifying what the problem is.