Keep solid logs about these notifications and the efforts you take to resolve them.

‘you pay me for this long detailed list of problems I resolve daily’ hands over thick stack of printed notes

‘The fact that you don’t notice me on the front end is proof I’m doing a good job of it.’

have your monitoring file these quiet reports as tickets, or just call them that, that’s a word they understand

Or just let every error occur in sight of everyone, delay fixing it at a reasonable time frame (not too long to inconvenience people, not to short to make them think it was easy)