Last time I tried the streaming in INDI was ~ two months ago, not sure if I was on 1.8.7 then, or when 1.8.7 was out?
When I tried it then, everything seamed to work. All the controlls, and streaming preview. However when I opened the file in ser player it was just a lot of noise. (It did roughly show the outline of the moon, but no usable image).
I can test it again next time I get some clear skies, and the moon is there. Longtime weather only shows rain, so might be a while.