I was pressued to shift the blame.

We received an angry email from a customer that some of their data had disappeared. The boss assigns me to this task. This feature is relatively new and we've found some bugs in the past in here. I go through request logs, search the database, run some diagnostics, etc. for about 5 hours and I cannot find the problem. I focus on the bugs that we've had before but they don't seem to be the problem.

I tell the boss "sorry but I checked XYZ and I can't find the problem. I'm out of ideas." But the boss wanted answers by the end of the day. They did not want to admit to the client that we couldn't figure out what's wrong.

By now I was more pressured to find an answer, find something or someone to blame it on, not exactly to find the real solution. So I made up some BS:

"Sometimes, in HTML forms, the number inputs allow you to change the number by scrolling. We have some long forms where the user has to scroll. Perhaps the focus remained on the number input, so when they scrolled down they accidentally changed the number they meant to input."

The boss was happy with that. We explained this to the customer, and there's now a ticket to change type="number" to type="text" in our HTML forms and to validate it in th backend.

A week later another customer shows us a different error. This one is more clear because it had a stack trace, but I realise that this error is what caused our last error. It was pretty obscure, mind you, the unit tests didn't detect it.

I didn't tell the boss that they were connected tho.

With two angry clients in two weeks, I finally convinced the boss to give us more time to write more unit tests with full coverage.