Issue - items on one side are not visible to choose in Join tool

[gregx]

This is weird, I added Join tool and on the left I have data coming from db and it's correct.

I want to add some manual input and use Join tool, for this I used Text Input.

However, data from right anchor (Text Input) is not visible, so I can't make the join.

I tried to run the workflow and then tried to make Join, but it's still not visible for Alteryx.

Like the right side doesn't exist.

Any ideas why it's not working?

Attached screenshots. Version: 2020.4.5.12471

[gregx]

Even with the simplest data (a,b,c,d...) it couldn't work. Probably the Alteryx does not work well.
Sometimes I could copy & paste tools to new workflow and it was working for few runs, but always after few runs something happened and it stopped working. 

Anyway, I had to rewrite it in VBA, cause it's not acceptable for business purposes that something sometimes work and sometimes not.