[BUG]: Locally reading the VCF file and online reading/extraction of the number of SNPs based on ID have differences.

[M-jk22]

When I download the VCF file locally via Open GWAS and then read it using the readVcf function, the number of SNPs extracted using the extract_outcome_data function (with snps=exposure_dat$SNP, outcomes=outcomeID) differs significantly. I have meticulously cross-checked the data, but the reason for the discrepancy remains unclear, for instance, in the case of ukb-b-6353.