In the last few days, when I go to move pre-existing cards to different lists (drag and drop like I've done for the past few years using the program), the card I have clicked on goes darker (pic below) than normal and Trello freezes. The freeze continues after refreshing the tab and only unfreezes when I open the page in a new tab. I can still make new cards, edit dates/labels. The system freezes only when I try to move cards.
Does anyone have a fix?