Line on tools pallet

[jondesu]

I'm getting a line (it changes colors depending on what's behind it) down the left side of the tools pallet. It moves with it, and I've never seen a line on any other window yet on this computer (M1 Mac mini), so I don't yet really suspect a graphics card issue, though I know it's possible. Anyone else seen something like this in Pixelmator classic, so I know whether it's isolated to my machine or maybe a bug that hasn't been addressed yet?

[jondesu]

Thanks, @henry76. I actually got a response from Pixelmator customer support saying it was a known bug that’s unlikely to be addressed because Pixelmator Classic is discontinued.