This is happening on another product.
I added about 5-10 variations, all with different part numbers, stock, prices, photos, saved.
Added more. Saved.
Added another 5 or 6, saved.
Now half of the variations I already saved are back to blank. No attributes selected, no SKU, no stock, no prices, no photos, nothing.
The 2 products I'm having issues with have around 50-70 variants each. Please help me.