Time Entering Auto-fill QOL

Hi,

When filling out a time entry, it will automatically calculate time taken and change times as needed. This morning I wanted to set a time entry from 845 → 915, so I filled out 845 and then changed the duration to half an hour, and instead of changing the end time from 906 to 915, it changed the start time to 836. Can you please program the autoadjust to remember which field you have more recently manually updated, or failing that, program the autoadjustments to prioritise times at quarter hours as the more important time

Thanks,

Mitch