Many people have had a similiar issue. My guess is you are using auto height for the fields that become "squished", as that is what I found to be the culprit. I found using PowerApps traditional rendering reduces the frequecnt that this happens. Lets hope autoheight gets fixed.
You can check out my post, where people gave a more detailed response: Auto Height Bug
Thank you for your reply Samuel,
The form was created from the base app that gets created from a SharePoint list - will specify the height and see if it still happens
Have you set the AutoHeight property of the DataCardkey control to true?
I have made a test on my side, and don't have the issue that you mentioned. Please check if you have turn on the AutoHeight property of the DataCardKey control within your Edit form.
Please take a try to turn off the AutoHeight proeprty for the DataCardKey controls within your Edit form, check if the issue is solved.
Please also take a try to turn off/disable the "Improved app rendering (final validation)" option within Advanced settings of App settings, then check if the issue is solved.
If the issue still exists, please consider take a try to re-create your app, check if the issue still exists.
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