Problem with clickable phone number in signature

To be able to call by clicking on the picture in the signature, in my signature there is a small picture with an attached link:

The problem is that when you reply to the letter or forwarding, this link in the signature is for some reason deleted (when I looked at the code I found out that href is missing).
How to solve this?
There is no problem when creating a new letter.

I can confirm that this bug is reproducible.

It does not affect regular HTML links in the signature, just dialable links.

If you have a Pro License, please open a support ticket directly with eM Client. They will be able to pass this on to the developers.

I do not have a Pro License. Is there another way to pass information to the developer?

I’ll ask them to look at this post, and they can ask you here for further information if necessary.

OK, thanks!