Which browser are you sharing from? Is it Firefox?
yes i also tested Chrome on android
so when displaying links we should show the uri-decoded version?
yes
Have you copied the link from your browser? I think the uri decode variant comes from your browser, because I can send and recieve it fine when I don’t use the uri encoded variant:
thank you for your response 
yes it happens when i copy the link from browser(Chrome, Firefox )…these browsers use encoded version (if your local settings are set to a certain language) and since no one types a long link like that, sharing them from browser will lead to a long gibberish text. is it possible for DC to keep the encoded variant when I paste an encoded link?
encoded link in Firefox:
Salaam! I think your name is Behnam. right? I am your mole inside. We are tracking this bug and many other similar bugs in Parse IRI links by farooqkz · Pull Request #57 · deltachat/message-parser · GitHub
Regarding decoding URLs with such characters, e.g. Persian/Arabic/Hebrew alphabets and German umlauts, I am in favor of not decoding them in DeltaChat unless some other messenger or chat app is already doing this and it’s a de facto standard.
my opinion is also that what you paste, should be pasted as-is if the browsers encode the URL then that is something to report to the browsers if someone things that is a bug, otherwise you would need to go around complaining to every single app out there to correct a behavior that is from your browser
UPDATE: it is actually possible to correct this behavior in:
set network.standard-url.escape-utf8 property to false via about:config, source: Making sure you're not a bot!
there seems to be this extension:
