Recently, someone has been watching the unlock calendar and shouting about selling pressure again.

I initially suspected that the on-chain data I saw might be "late"...
To put it simply, what you see in your browser/wallet are mostly nodes/RPCs/indexers relaying to you, not the chain itself speaking.
RPCs get stuck, indexes lag behind, new transfers might only appear a few minutes later, and balances might also be incorrect at first.
When I cross-chain, I always try small amounts multiple times, just to avoid this kind of delay and reorganization messing with my mindset.
I'd rather confirm slowly, wait for a few more blocks before moving large amounts, to prevent scaring myself.
Anyway, the so-called "real-time" on the chain, needs to be put in quotation marks.