Pinned piece indicators are added on each pin

[Siderite]

I don't know if that's intended, but if you go here:
https://lichess.org/analysis/fromPosition/qk1r2b1/8/8/2rP3R/8/1B6/6Q1/3K4_w_-_-_0_1?color=white

with the Pinned pieces setting on, you get this:

Now, considering this doesn't happen with Checkable king in a position such as https://lichess.org/analysis/fromPosition/4k3/8/8/5N2/8/8/6B1/3QK2R_w_K_-_0_1?color=white I suspect it's a bug.

[johndoknjas]

Unclear if this was intentional, although one could argue it's useful to show a piece/pawn is pinned multiple times. Whereas for checks it's not uncommon for multiple to be possible.