Hello Dr, when testing some things for a server, me and a friend discovered this weird blue bug that happens when making the tainted blood bottle in the alchemy table. In the picture below, this is me making a rank 5 tainted blood bottle.

This is on a server using the latest versions of Vampiric Ageing and Vampirism.

Nevermind. With more testing, I discovered that it is the alchemy table itself not just this one recipe. Apologies.