Migration between servers issue

Hi support

First time using the software to migrate a site from my development server to a sub folder on the live server where the site will run from.
Everything seemed to go ok except that places where a % character was present caused the character to be replaced with this code {1ae7a3004bacac7e26de1ccdcf3128f89c4d2e249faeb16a7555d03f6b148cb6}

This happened on a site I am running the Divi theme and the divi builder uses percentage symbol as an option for padding – all of which were altered to pixels so had to manually fix.

Forms use %%name%% for specifying the message format and they were all corrupted with the % symbol being replaced with the above code.

Even text on a page where I had a sentence containing say 45% the symbol was replaced with the code.

I have been through the site and manually fixed over 200 issues and worried that there may be more lurking I am unaware of until the site gets used in earnest.

I believe I followed all the steps correctly – any ideas what may have occured?

Regards