New GUI number of solar bars vary

I see sometimes the solar generation shows three bars (I presume for one mppt and 2 x Fronius?):

… and sometimes shows only one:

Why? Bug? The second image was taken a minute after the first, having refreshed the remote console.

EDIT: I updated to v3.51 and it first showed 1 bar, and is now showing 2.

So Im guessing no-one has any idea still?

I’ve also seen this numerous times and also asked on the community. Received no replies. Probably a bug, however it would be awesome if it would display separate solar production in such a way.