There's a slightly different (I think) bug which I've been hitting since the update with URLs. The URL keyboard allows long-pressing on the . to open various TLDs, speeding how long it takes to write a URL.

In prior versions, you could long press to open the choices, then letting go would insert the default (eg .com)

With iOS 26, the touch target seems to be slightly different for triggering the options vs selecting them. I now frequently long-press, see the TLD choices with the default selected, and then releasing incorrectly inserts a single . instead of the TLD. This is infuriating when typing fast.