Version 2 (I think) iPhone 15 Plus, iOS 26.5.2
It gets a little laggy after I select more than 10 pics in the img picker and then if I scroll quickly it hangs. Twice, after selecting the pictures it crashed, seemingly when I scrolled. A couple times when I was able to successfully select them, it was very laggy while trying to write a title and crashed eventually. Happy to provide more details!
Thanks for reporting! Will take a look!