I changed my signature but it doesn't show as shown in the editing window, instead it shows as it was before saving it.

I changed my signature but it doesn't show as shown in the editing window, instead it shows as it was before saving it.

I added an image via URL in the original size, added a description thinking it might be an alt tag (which would be useful when some people or email clients block images in emails, so incidentally you should have that instead, which is more important than having a caption). Then I sent a test email, saw that the description is visible as a caption, so edited the signature again to remove the image, and add the same image again via URL, in the best size, without a description, and saved it. I sent a test email but it isn't changed. That is, the image is still in the original size with a description/caption.