Help! PS rotating my canvass when pressing tablet buttons.

I posted this some months ago, and received neither a solution nor any kind of response at all. What alarmed me, and is driving me to write this help request out again, is that when I attempted to find my original post to see if any solutions had been suggested since I last checked, the post was removed and my account has no posts to its name, as if it simply did not exist - or more likely, that the post was pruned, removed, filtered, or expired. So I will attemt to reiterate my particular issue to the best of my ability and in doing so I hope to find a solution.

To explain the problem, when I am using photoshop (CC2019, 20.0.4), I will have an issue where as I am using the [ and ] shortcuts to enlarge/reduce my brush size, the canvass will rotate exactly 5 degrees. [ rotates it 5 degrees counter-clockwise, and ] rotates it 5 degrees clockwise. These are not shortcuts I have bound. I access these shortcuts by pressing the 3rd and 2nd express keys on my CTH-470 respectively. So 2nd express key is bound to ] for a larger brush, and 3rd express key is bound to [ for a smaller brush.

This problem is elusive, and tends to disappear for several hundred [ or ] actions at a time, before rearing its head for a short period and rotating my canvass exactly 5 degrees several times while I'm in the middle of working, and then refusing to reproduce itself when I turn on screen capture software. However, I managed to clip the problem happening on a capture of NohBoard I had running. The clip shows that in the middle of tapping [ and ], at some point, the alt key lights up halfway through a push of [ - to note, it happens so quickly that it is impossible for me to have actually pressed it myself. I'm already pressing [ and ] as fast as I can. This may be a hardware problem, I concede, but solving this with replaced hardware is something I'm going to be trying to avoid.

As I said, this isn't an issue with a keybind I have placed myself, and NOWHERE can I find a keybind that rotates the canvass exactly 5 degrees. Moreover, pressing alt then [ or ] simply selects the layer below or above the currently selected layer, and pressing [ or ] then alt manually simply produces a windows jingle to notify me of an incorrect action. I am absolutely beside myself trying to figure out HOW or WHY even a hardware malfunction has been producing this exact problem for years and multiple versions of photoshop at this point, and what inputs it could be malfunctioning to produce a consistent and precise 5 degrees of rotation in a predictable orientation based on a very inconsistent and painstaking-to-intentionally-reproduce error on the input of the larger-brush or smaller-brush shortcuts. It doesn't cause the rotation tool to appear, it doesn't change my current tool, or open any menu, it simply rotates the canvass 5 degrees in an orientation determined by which [ or ] input it decided to error on.

So, knowing what exactly the problem is, and the potential source - at least on the input device side - being a very old tablet, is there any shortcut I have overlooked that serves to rotate the canvass exactly 5 degrees in an orientation based on a [ or ] input that I have overlooked so that I may disable it? Because I simply cannot find "rotate canvass 5 degrees".