I researched this several years ago and read to flash the blinds they needed to be paired with the IKEA hub. This means they will need to be unpaired from HE then paired to HE again once the flash has completed.
The current firmware is 2.3.088
The change log states
◉ FYRTUR and KADRILJ roller blinds (V-2.3.088)
◆ Solves an issue where some blinds report inconsistent battery level.
◆ Solves an issue where some blinds would not confirm a reset by movement.
My 12 blinds work fine except for 2 or 3 that insist on losing their limits when the battery is replaced. They go full open once the battery is installed as designed , but when commanded to close, these rogue blinds go full close and keep going until they roll up backward.