I need ER diagram to have more column than 3

Currently I’m convincing our product team to use lucid chart so that we can discuss our project development on LucidChart. First they felt the tool was comfortable when using the table feature so that they can fill in the tables and link lines by row with ER diagram table shape(sad thing is regular table shape does not support table row linking to another table row with latching). Unfortunately, what our product team member realized is that whenever they want to add more columns than three for the table, the shape does not support that functionality which makes everything useless. I told them to try out regular table shape but they say when they manually link the row with the line and add extra row at the bottom, the linked line position above the target row moves relatively to the height of the table which they have to manually adjust all connected line position. Please make development team to make a feature to fix the latched line position to absolute position.