Weird water bug discovered?

Hello all!, I have recently been toying around with some of my favorite mods alongside Sodium+ Iris when I discovered this graphical bug affecting vertically flowing blocks of water. Please see provided images for a visual demonstration. as soon as I began to notice this issue, I uninstalled any other mods to rule out which one it actually was that was causing this weird panel-like graphical error. It wasn't until I added sodium and iris to this list that the bug reappeared. Nothing I could change in the settings affected this either. Any thoughts? 😦 Thanks in advance!