Threshold resets while adjusting

When I try to threshold using the thresholding menu (ctrl+shift+T), I can’t adjust the bars properly.
I can grab the upper slider and the lower slider moves with it, to the exact same value (which makes the image appear all black).
When I grab the lower slider, the upper slider jumps to the left-most value (1e-30). This makes the image appear fuzzy and doesn’t allow for proper thresholding.
It doesn’t help to choose other methods or other backgrounds.

I couldn’t find any reports on how to fix it. Is this a known issue? How can I fix it?
I am on the latest version.

Best,
N.

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