Blu-ray discs in the Pioneer BDR-XD05T drive have become smaller 25GB-22.5, 50GB-45.1, WHAT CAN BE THE PROBLEM?

Question

Blu-ray

Blu-ray discs in the Pioneer BDR-XD05T drive have become smaller 25GB-22.5, 50GB-45.1, The drive was reflashed, everything is unchanged, everything is fine with the blanks, before the same ones were 23.3 and 46.6GB

Answer 1

50000000000 /1024^3 = 46.6, 4% error from your 45.1. Here is the arithmetic of the manufacturer.