Consecutive amino acids are invalid protein extension variants

[nh13]

SnpEff produces an invalid HGVS protein description for the following variant

cDNA: ENST00000417740.1:c.1503_1504delTGinsGA protein: ENST00000417740.1:p.TyrGly501*

For extension variants, it is invalid to have two consecutive amino acids. Instead, it should be p.Tyr501* as per mutalyzer