First time for me last week. It presented as a very mild cold, but as I had a LFT kit, I tested.
4th jab was about 3 weeks ago (bivalent)...
Had issues with extremities feeling cold and dehydration (peeing more than I could drink, but no headache or dark pee - 2kg weight loss).
According to guidance, I would have still been working if I hadn’t taken a test (no raised temperature and well enough, testing not recommended, but if you do and it is positive, then 5 days off).