iPhone Safari: Incomplete website view with text boxes

i'm having problems with safari not showing entire view of websites when i enter a text box. i have my settings set to %115 to view sites because it makes it easier for me to see. problem is certain times the bottom of the site won't show. example is logging into this community. when i enter my email and click the check button to close the text window. the continue button at the bottom doesn't show. but if i scroll down trying to go below what i see. sometimes it will show but bounces right back down out of view. one time i was able to hold it in view with the scroll button but couldn't click it. i guess cause my finger was already on the screen holding the scroll. but what's weird if i keep scrolling up and down, sooner or later the very bottom part that says united states etc will show and the continue button is under that, but i can then scroll up and see the continue button. i've even went back and set to %100 view and still had the problem sometimes. i needed to make the site view even smaller to see it. but the reason i don't think it's truly a zoom problem is that i can temporarily see the continue button sometimes when scrolling. so it's there, just out of reach. it shouldn't matter how much i'm zoomed in. i should still be able to scroll to the very bottom of a site. this happens with several sites, sending a message in ebay does the same thing but opposite. i'm toward the bottom to send a message, after clicking send, i can't see the back button at the top of the page. i have to play with the scroll going back and forth letting it bounce around and then all of a sudden it will go all the way up. hopefully i'm explaining this well. iphone 13 ios26.2....