Seurat 'subset' function will drop off my created Assays, what can I do

[JaxonHello]

Hi, I meet a problem when I use subset function.

I create a Assay object 'Baiting' to my seurat object 'cell', and I run the 'subset' command to filter the cell/gene. However, I found there is no 'Baiting' assay in my new cell object. how can I do the retain my Assay in new seurat object.

This is my code below:

`

antigen <- grep("^CustomAbSeq", rownames(cell@assays$RNA), value = TRUE)
Baiting_assay <- CreateAssayObject(cell@assays$RNA@counts[antigen, , drop = FALSE])

cell <- subset(cell, features=setdiff(rownames(cell), antigen))
cell[['Baiting']] <- Baiting_assay
Assays(cell)
[1] "RNA" "Baiting"
rm_Ig_gene <- c('Igha', 'Ighd', 'Ighe', 'Ighg1', 'Ighg2b', 'Ighg2c', 'Ighm', 'Igkc', 'Iglc1', 'Iglc2', 'Iglc3')
cell <- subset(cell, features=setdiff(rownames(cell), rm_Ig_gene))
Assays(cell)
[1] "RNA"`

Thanks very much for any advice and help!