Why I cant Copy paste on Facebook

hey! my iphone 12 mini after I updated in ios 14.5.1 it doesnt let me copy paste any post in Facebook!

i tried to install/uninstall and updated facebook app trillion times but still it wont let me copy past the post or status.. what's the problem??? Oh! I did restart and hard reset my phone.. but still it wont let me copy paste in facebook.. this really sucks!!