Same here for KLM.

Dang no way? I had a terrible experience with them (tbf it was half a decade back at this point). We were in line to check in, something like 1.5hrs before a one hour flight. The line was agonizingly slow (only 2 of like 5 check-in counters were staffed), and when we got to the counter they said we were too late, missed the window for the flight. We only had carry-ons, were 3min late for their arbitrary window, and the plane still wasn't scheduled to leave for an hour or so.

We were clearly in line before their deadline, were certainly going to make it to the gate before they even opened for boarding, had no checked bags, and they made us buy new tickets. The cherry on top was that they ran flights every hour, so we bought the ticket for the next hour but the gate agent let us on the original flight we had- so they basically just forced us to pay double for our flight.