Files uploaded that are close to the size limit are ignored and not seen by the AI

I’ve seen this happen in multiple different instances now. I have a text file I want the model to read and summarize for me. It’s too large, I break it in smaller parts until it can take them. But sometimes if that smaller file is just close enough to the limit of what it can take it will allow me to upload the file but then react as if I didn’t upload anything. It will tell me I didn’t sent a file at all. I need to remove more text from the file and do it again and then it is able to see the file.