Pressing CTRL+SHIFT clears current selected, SHIFT+CTRL doesnt, issue with MouseFreeURLHandler

[marl-scot]

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With MouseFreeURLHandler disabled :
Highlight a piece of text in the terminal :
If I press the following sequence of keys : SHIFT+CTRL+C
Text is copied into clipboard, and selection remains highlighted.
If I press the following sequence of keys : CTRL+SHIFT+C
Text is copied into clipboard, and selection remains highlighted.

With MouseFreeURLHandler enabled :
If I press the following sequence of keys : SHIFT+CTRL+C
Text is copied into clipboard, and selection remains highlighted.
If I press the following sequence of keys : CTRL+SHIFT+C
As I press the SHIFT Key, the selection is cleared, you dont get as far as pressing 'C'
If I continue with the key sequence, then i get '^C' being shown then a new line.

To Reproduce
Enable MouseFreeURLHandler
Highlight some text
Press CTRL then SHIFT
Highlighted test is un-highlighted.

Expected behavior
Highlighted text should not be un-highlighted

Desktop (please complete the following information):
Distributor ID: Linuxmint - MATE
Description: Linux Mint 21.3
Release: 21.3
Codename: virginia
Desktop : X11 - Mate
Terminator Version : 2.1.4