I just updated to 2019 sp1 and now find when I right click on a part on a sheet and choose properties, the Balloons box with (Link balloon to specified table) is not populated with any tables to choose from, even thought there is a BOM  on the drawing. The way I make a BOM table is left click on an assembly that it on a sheet and choose Bill on Materials. I hit ok and have my BOM with all parts on the assembly listed. If I now add a part to the sheet that is within the assembly and place a balloon on it, it is not linked to the BOM I just created or is the BOM even listed in the (Link balloon text to specified table) box.