Hi David,
The updates to solar PV divert in V2.9.1 include a ‘smoothing’ algorithm so changes in solar PV may not take effect instantly. You can adjust the parameters of this algorithm in advanced settings if required.
Your screenshot shows an excess of 997W, an excess of 1600W would be required to increase the charging rate to 7A.
6A is the minimum charge rate, if the excess power drops below 1400W for a period the charging will pause.