Plot density issue for >1 gene and the projection output

[ganpha]

Hello,
I'm using Seurat v5 with an RDS object obtained by using the BBKNN integration protocol. The Plot_density function does not generate a plot for more than one gene, and for a single gene, it produces a t-SNE projection instead of a UMAP projection. Please advise on how to resolve this issue? Thank you for any help!