If I highlight some text in an article and use the link icon (chain link) then links to Contacts take me to the wrong contact.
If I use the Contacts button at the bottom of the editor then it goes to the correct contact.

We have also found that when doing the same but linking to an article the link created has the id of the home page added. This results in the link displaying the article with all the home page modules.
If I create the link using the article button at the bottom then no cat id is added and you just get the article displayed without additional modules.
Is that correct/normal.

Creating a link to a contact using the link/chain icon used to work but goes to the wrong contact when using version 2.9.7

I am having the same problem with creating links to contacts. I actually noticed this a few weeks ago, but I was in a rush and forgot about it and it didn't come up again until now, so I think it's been a problem for a few versions.

The link generated by the editor link icon is

/component/contact/contact/167-?Itemid=490
It should be
/component/contact/contact/203-pickleball?catid=167:subject-advisers&Itemid=490

Using the button at the bottom of the editor, generates the URL
/component/contact/contact/167-subject-advisers/203?Itemid=490

Joomla 3.9.26
JCE Pro 2.9.7
URL Routing: Legacy

I haven't had a problem with linking to articles with home page modules displaying elsewhere, but then I use Advanced Module Manager which stops home page modules displaying on other pages.

Tried 2.9.8 Beta on a non-production site and it fixes the problem.
Thank you