Sorry to say but we have clicked on multiple Filters in the Sidebar of your Site and can’t seem to find any such issue that you mentioned: https://i.snipboard.io/TXA2Ei.jpg
Could you please be more specific in your concern? What exact issue is arising? Also please share some useful Screenshots too for better understanding.
Regarding the Filters Icon hiding, as you are using Shop page Sidebar on your Site then you can go to Dashboard > Theme Settings > Product archive > Shop filters > there turn off the Shop filters toggle button: https://i.snipboard.io/ai7O9Z.jpg