Toolbar custom action icons not scaled

Version information

4.20.6

Moksha. Confirmed on Bodhi

Steps to reproduce

1. Open thunar
2. Edit> Configure Custom Actions
3. Click "+" to Create a Custom action
4. Click "No icon"
5. type 'term', select terminology icon (assuming you have terminology terminal installed)
6. give 'action' a temp name and save.
7. See big icon on toolbar. see image link

Current behavior

Icons can be way to big

Expected outcome

Icon normalized to fit toolbar

Additional information

https://bayimg.com/3687bc69957cba6d485e80075a3e042b09123a76.jpg