No, that’s a limitation of the fv-1 chip. The fv-1 only fetched the data from the eeprom when it detects a change on pins 16-18. Flipping the A/B toggle doesn’t affect pins 16-18, it just affects which eeprom chip will be active when the fv-1 fetches the data. So, when the toggle is flipped, the fv-1 doesn’t know to fetch new eeprom data until you move the rotary.
Hope this helps