How did that happen?
The Texas secretary of state initiated the review effort in late January when it distributed lists of about 98,000 individuals it identified as “possible non-U.S. citizens” because they had provided the state with information that showed they were not citizens when they obtained a driver’s license or ID card. The lists were shipped off to counties with instructions for how local officials should review and investigate those voters by using the proof-of-citizenship letters.
At least 25,000 of those individuals were erroneously flagged by the state because of a mix-up between the secretary of state’s office and the Department of Public Safety, which had provided the data on which the review was based. But the methods used to compose the entire list remain questionable.
https://www.texastribune.org/2019/03/15/texas-counties-removed-14-voters-rolls-citizenship-review/
At least Texas has a two voting cycle after which new voter cards are mailed to the voters. If returned this gives then some info that may mean they need to be removed from the list. If the card holder doesn’t respond they should be removed, IMO.