In Multiterm, the cursor keeps jumping over to the left panel (Hitlist) while I'm trying to edit an entry in the right panel, and Tab can't be used to move it back to where I need to edit on the right.

In Multiterm, i.e. the new Service Pack edition for 2017, the cursor keeps jumping over to the left panel (Hitlist) while I'm trying to edit an entry in the right panel. Therefore, I continually have to re-click on the parts of the entry where I want to make changes. Even worse, ONLY the mouse works to re-locate the cursor in the places I need to edit in the right panel, because this version of Multiterm makes it impossible for me, by using Tab or arrows alone, to get back from the left panel to wherever I need to edit in the entry. How can I solve this?