Not executing SSJS code in eventHandler with complete refreshMode in XPages

Question

It's been 3 weeks since I've been struggling with this problem

onClick eventHandler rejects to show any signs of being working properly when it goes hand in hand with refreshMode="complete"

The code is below:

<xp:button id="begginYOU"
            style="float: right; margin-right:20px;"
            value="Send">

            <xp:eventHandler event="onclick" refreshMode="complete"
                  submit="true">

                <xp:this.action><![CDATA[#{javascript:
                print("I will never get this message printed with complete refreshMode");

            }]]>
                </xp:this.action>

            </xp:eventHandler>

</xp:button>

I've tried everything - setting properties of id (on eventHandler itself), adding CSJS code which returns true (the message which I've added to console.log was always printed btw), setting disableValidators to true

I've even tried to remove all the inputs and just leave this one button on the entire page - nothing helped

Whenever I click the button - all I get is just a loading next to the tab's icon in the browser for just half a second and nothing, literally NOTHING happens

It ONLY works with refreshMode and execMode set to partial (provided that I provide ids respectively) but I have no idea why

It really drives me around the bend

But anyway I hope to receive experts' opinion on that problem, because I've run out of ideas

Many thanks in advance