Given the expertise here..
Twice I've seen this odd process on the bank account. I've paid in a cheque using the take a photo method on the banking app. Say the cheque was for xx.yy, ie xx pounds and yy odd pence. The two cheques were for different amounts.
Each time, looking in the banking app the next day, the cheque shows in the list of transactions under yesterday, but the current balance is xx less than the sum of all the transactions. In other words, it appears to have added the yy pence to the balance immediately but not the xx pounds. The xx pounds will be included in the next day's balance which will then agree with the sum of all the transactions listed.
OK, I can understand the cheque being in some pending state until cleared, but surely you'd do that for the whole amount, not just the whole pounds?!
nib