Hiya @Devonm1992 and welcome to the forum
I`ve never seen that kind of damage either from any kind of disease or insect. The rest of your plant looks very well cared for and healthy, so the only thing I can think of is human intervention (spilt cuppa) or maybe, as the leaf appears to have been folded over, a spill with the watering followed by a dose of strong sunshine ???
If the plant was mine, I would probably cut the damaged leaf/leaves off.
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.