For the 4 day spending graph, Nov. 5-8, when there were 5 transactions seen at bottom (some positive, some negative), the spending chart is missing.
I get that there is 'negative spending' because the credits outweigh the expenses, but i've done similar charts before where it was negative, and there was still a category breakdown for the non-negative charges.
In other words, as far as I know, this behavior is "new", and it appears to be irregular.
-Rob
p.s. I tried this in chrome (including incognito which is virtual clearing of cookies/cache), and I tried it in Safari, with the same results. Mac OS Tahoe 26.1