I'm running into problems of not knowing how to politely remind my professors of writing me the LORs and informing them of a potential technical problem at the same time.
I recently had a professor who was trying to submit an LOR to University A seven times, but Uni A's system had a technical issue and didn't let him upload the letter at all. He contacted tech support but they never got back to him and, eventually, he gave up and asked me to ask for other professors for letters. This is a very reasonable request since the system was truly frustrating.
My problem is that I don't know if that technical issue will happen to others as well when submitting the letters, but I don't want to wait until the last minute for them to submit the letters and tell me the system doesn't work. It would be very risky.
So I want to let them know that Univ A's system might have this issue and want to have them trying uploading letters ASAP, so that if there's a problem, I'll have time to fix it. But, at the same time, these are the same professors who are writing me letters for other universities, not just for Univ A, and I don't know how to frame the letter to remind them? Will it seem like I rushing them to upload all the letters to all the schools?