Slurp doesn't receive simulate mouse pressing event

slurp 1.5.0-1
sway 1.10
I simulate mouse pressing to slurp via
```
slurp -p & sleep 1; swaymsg 'seat - cursor press button1'; swaymsg 'seat - cursor release button1'
```
OR
```
{ sleep 1; swaymsg 'seat - cursor press button1'; swaymsg 'seat - cursor release button1'; } & slurp -p
```
All seems slurp doesn't receive simulate mouse pressing event.

Start by reproducing the issue with slurp -p and the swaymsg seat cursor press/release commands, using both shell command forms shown. Trace how slurp receives pointer events and verify that the simulated press and release select a region as expected.

Written by the indexing model from the issue text.