We're in the process of implementing an update for Rank 5 Supports that acquire support shards. This change would see the acquired Supports Shards converted at a 2:1 ratio into Wildcard Support Shards and will be implemented in R296.
If you have recently been affected by this scenario, please reach out to customer service and we will manually retroactively convert your shards into Wildcard Support Shards using the 2:1 calculation.