Random HTML characters appearing in Zoho Email body

I have a simple workflow which receives HTML content prepared somewhere else and send them as email body.
But, facing some strange issues while sending it using Zoho Email. Every time I add the body save and exit, by the time I reopen the workflow, I see some extra content below. Also, every mail I sent has extra data towards the end (which seems to be partial of actual HTML data. Can't seem to get rid of it.

Hey @voldemort

Could you please share the name of the workflow in which you are facing such an issue, so that we can look into it and guide you accordingly?

Here is the workflow. https://connect.pabbly.com/workflow/mapping/IjU3NjEwNTZjMDYzNjA0MzY1MjY0NTUzYyI_3D_pc

Thanks for sharing the link, we will look into this and get back to you.