I've just removed my free trial Libre 2 sensor for pretty much exactly this. 2 days ago, readings from sensor took a massive nosedive, well into hypo territory. Thought it really odd because I felt absolutely fine. BG test 6.4. Monitor kept diving. Phone app kept buzzing. I kept comparing. App "you're going to black out soon", BG "you're ace". Had to switch the phone alarms off during the night. Morning, sensor telling me I'm sky high, BG still mid 6's. The sensor is now sitting on my desk and I'm sticking with pre/post meal blood tests.
Emailed Abbott. Response for more information is understood but feels a wee bit like it is designed to be difficult. Have answered all the questions and sent all the screen shots. Let's see.