Attachments being clipped

From: Stunt Engraver (DGL) 2 Aug 14:38
To: ALL1 of 4
I don't know if "clipped" is the correct terminology, but it's a recent development on my Beehive forum, in which, when attachments are posted, a portion of the image at the bottom is missing.

An inadvertent cropping.

Any idea of what could cause that anomaly?

I've been running my forum for over ten years and this is something new.
From: Stunt Engraver (DGL)20 Aug 04:09
To: ALL2 of 4
I'm attaching an example of what happens to attachments when posted on my forum.

Grasping at straw, I can say the only change we made to the server is, we had to do an Apache upgrade.

I also get notifications that our version of mySQL (5.6) is out of date on the server and should be upgraded to 5.7.

I'm hesitant to make another change.
Attachments:
From: Matt26 Aug 17:48
To: Stunt Engraver (DGL) 3 of 4
Can you include a link to where it is happening?
From: Stunt Engraver (DGL)27 Aug 17:02
To: Matt 4 of 4
Hi Matt,

Do you mean a link to the site, or a link to the attachment?

www.engravingetc.org is the site.

It's a private forum, but you should have access, as you've been given access in the past.

Username: MATT
EDITED: 27 Aug 17:09 by DGL