Issue paste and edit in keypad Iphone

Hi. I have an issue with ios 14. Pasting copied number in the dial/keypad deletes numbers which are already written... before I paste the copied nr, I have to write country nr first (+421 for Slovakia)... If I try to edit the pasted nr, I cannot delete the requested numbers. It deletes very last numbers only, even if the cursor is moved in front of the first number. Example: I copy cellphone number from the webpage: 0908123456 and need to add country code +421 before I can dial... this is not possible like with ios 13. Please repair it...